Overhauling A Seiko Bullhead - Full Rebuild - 6138-0040

Weekend Watch Repair March 29, 2023
Video Thumbnail
Weekend Watch Repair Logo

Weekend Watch Repair

@weekendwatchrepair

About

This channel is all about bringing old watches back to life—one project at a time. Whether it’s a vintage piece from the bargain bin or a watch that hasn’t ticked in decades, every timepiece gets a shot at redemption here. I’m a hobbyist watchmaker learning as I go, sharing the full process along the way. From teardown and troubleshooting to casework and reassembly, I try to show it all—successes, mistakes, and the unexpected problems that come with working on old mechanical watches. If you're into the technical side of watch repair, enjoy seeing how things work, or just appreciate the art of putting something broken back together, you’ll feel right at home. My goal is to make each video as informative as it is satisfying—sharing tools, techniques, and a few tricks that don’t always make it into other videos. Whether you’re learning the craft or just enjoy the journey, I’m glad you’re here.

Video Description

Come along as we take on the challenge of reviving a Seiko Bullhead watch that was sold to me by a deceitful eBay seller. From fault finding and disassembly, to the final touches of the rebuild, witness every step of the process and see how we triumph over the seller's dishonesty to create a fully functional and beautiful retro timepiece. Seiko Model # 6138-0040 Behind the scenes of YouTube content, there's dedication and hard work. If you enjoy the channel, I'd kindly ask your consideration in joining this effort on Patreon. Your support keeps the channel going. One hundred precent of all funds received go directly into the channel. With sincere gratitude, thank you so much for your consideration. https://www.patreon.com/WeekendWatchRepair Enjoy the video! Chapters: 0:00 Intro 0:33 Inspection 3:34 Case Removal 5:05 Dial & Hands Removal 7:57 Dial Side Disassembly 16:50 Rear Side Disassembly' 27:37 End Shake & Jewel Inspection 28:43 Pre-Cleaning 29:20 Barrel Bridge Jewel Upgrade 30:07 Cleaning 32:19 Jewel Cleaning & Lubrication 34:36 Balance Inspection 35:34 Barrel Lubrication 37:46 Center Wheel Assembly 38:44 Keyless & Motion Works Assembly 46:22 Hour Recording Chrono Assembly 51:13 Rear Side Wheel Train Assembly 55:24 Rear Side Chrono Assembly 1:08:08 Pallet Fork & Balance 1:12:05 Calendar Works Assembly 1:16:16 Dial & Hands Install 1:20:01 Case & Final Assembly Music from #Uppbeat (free for Creators!): https://uppbeat.io/t/giulio-fazio/manouche-in-belleville License code: ZWCZBO28WY3785TC

Upgrade Your Tech Today

AI-recommended products based on this video

Loading...
VANMASS [85+LBS Strongest Suction & Clip] 2025 Upgrade Car Phone Holder [Patent & Safety Certs] Cell Phone Mount Truck Stand for Dashboard Windshield Vent for iPhone 16 Pro Max 15 14 13 12 Samsung

VANMASS [85+LBS Strongest Suction & Clip] 2025 Upgrade Car Phone Holder [Patent & Safety Certs] Cell Phone Mount Truck Stand for Dashboard Windshield Vent for iPhone 16 Pro Max 15 14 13 12 Samsung

(54,882)
$32.25
FREE delivery Mon, Aug 25 on your first order
1K+ bought in past month
Loading...
iPhone Charger Fast Charging [Apple MFi Certified] USB C to Lightning Cable 6FT USBC to Lightning Cable Nylon Braided Type C Cord for iPhone 14 13 12 11 Pro Max XR XS X 8 7 6 Plus SE, iPad

iPhone Charger Fast Charging [Apple MFi Certified] USB C to Lightning Cable 6FT USBC to Lightning Cable Nylon Braided Type C Cord for iPhone 14 13 12 11 Pro Max XR XS X 8 7 6 Plus SE, iPad

(4,036)
$8.99
FREE delivery Sun, Jun 29 on your first order
2K+ bought in past month
Loading...
iPhone Charger [Apple MFi Certified] 3FT, 3Pack USB A to Lightning Cable Braided Fast Charging Apple Cord Compatible with iPhone 14 13 12 11 Pro Max XS XR X 8 7 6 5 Plus iPad/iPod/AirPods

iPhone Charger [Apple MFi Certified] 3FT, 3Pack USB A to Lightning Cable Braided Fast Charging Apple Cord Compatible with iPhone 14 13 12 11 Pro Max XS XR X 8 7 6 5 Plus iPad/iPod/AirPods

(5,626)
$17.99
FREE delivery Sat, Jun 14 on your first order
50+ bought in past month
Loading...
2Pack 10ft iPhone Charger 90 Degree Lightning Cable Right Angle Long USB Charging Cord Compatible with Apple iPhone 14 13 12 11 Pro Max XS XR X 8 7 6 5 Plus iPad iPod

2Pack 10ft iPhone Charger 90 Degree Lightning Cable Right Angle Long USB Charging Cord Compatible with Apple iPhone 14 13 12 11 Pro Max XS XR X 8 7 6 5 Plus iPad iPod

(2,193)
$14.24
FREE delivery Sat, Jun 14 on your first order
400+ bought in past month
Loading...
2Pack 10ft iPhone Charger 90 Degree Lightning Cable Right Angle Long USB Charging Cord Compatible with Apple iPhone 14 13 12 11 Pro Max XS XR X 8 7 6 5 Plus iPad iPod

2Pack 10ft iPhone Charger 90 Degree Lightning Cable Right Angle Long USB Charging Cord Compatible with Apple iPhone 14 13 12 11 Pro Max XS XR X 8 7 6 5 Plus iPad iPod

(2,193)
$14.24
FREE delivery Sat, Jun 14 on your first order
400+ bought in past month
Loading...
Magnetic Wireless Charger for iPhone: Fodable 3 in 1 Charging Station for Multiple Apple Devices - Travel Charging Pad Dock for Apple Watch iPhone 16 15 14 13 12 Pro Max Plus & Airpod Global Recycled Standard

Magnetic Wireless Charger for iPhone: Fodable 3 in 1 Charging Station for Multiple Apple Devices - Travel Charging Pad Dock for Apple Watch iPhone 16 15 14 13 12 Pro Max Plus & Airpod Global Recycled Standard

(656)
$49.99
PrimeFREE delivery Sat, Jun 14
100+ bought in past month
Loading...
Magnetic Wireless Charger for iPhone - 3 in 1 Mag-Safe Charging Station for Multiple Devices Apple - Charger Stand Dock for Apple Watch iPhone 16 15 14 13 12 Pro Max Plus Airpods

Magnetic Wireless Charger for iPhone - 3 in 1 Mag-Safe Charging Station for Multiple Devices Apple - Charger Stand Dock for Apple Watch iPhone 16 15 14 13 12 Pro Max Plus Airpods

(750)
$59.99
PrimeFREE delivery Sat, Jun 14
Loading...
iPhone Charger [Apple MFi Certified] 3FT, 3Pack USB A to Lightning Cable Braided Fast Charging Apple Cord Compatible with iPhone 14 13 12 11 Pro Max XS XR X 8 7 6 5 Plus iPad/iPod/AirPods

iPhone Charger [Apple MFi Certified] 3FT, 3Pack USB A to Lightning Cable Braided Fast Charging Apple Cord Compatible with iPhone 14 13 12 11 Pro Max XS XR X 8 7 6 5 Plus iPad/iPod/AirPods

(5,626)
$17.99
FREE delivery Sat, Jun 14 on your first order
50+ bought in past month
Loading...
Switch Game Case for Nintendo Switch - Portable Cartridge with 12 Game & 12 Micro SD Card Slots, Switch Card Case- Hard Shell, Soft Silicone Lining, Magnetic Closure

Switch Game Case for Nintendo Switch - Portable Cartridge with 12 Game & 12 Micro SD Card Slots, Switch Card Case- Hard Shell, Soft Silicone Lining, Magnetic Closure

(20)
$12.99
FREE delivery Sun, Jun 15 on your first order
Loading...
Furiet Phone Case for Samsung Galaxy S24/S25 5G with Tempered Glass Screen Protector Card Slots Ring Stand Shockproof Soft Silicone Bumper Hybrid Two Layer Defender for S 24 24S 25 25S G5 Men Black

Furiet Phone Case for Samsung Galaxy S24/S25 5G with Tempered Glass Screen Protector Card Slots Ring Stand Shockproof Soft Silicone Bumper Hybrid Two Layer Defender for S 24 24S 25 25S G5 Men Black

(3)
$41.69
FREE delivery Jun 13 - 17
Loading...
Vihibii for Samsung Galaxy S25 Ultra Case with Card Holder (4 Cards), RFID Blocking & Slide Camera Cover, Military Grade Drop Protection, Rugged Hard Back & Silicone Edge Wallet Case, 6.9" 2025, Black

Vihibii for Samsung Galaxy S25 Ultra Case with Card Holder (4 Cards), RFID Blocking & Slide Camera Cover, Military Grade Drop Protection, Rugged Hard Back & Silicone Edge Wallet Case, 6.9" 2025, Black

(174)
$27.99
FREE delivery Sat, Jun 14 on your first order
200+ bought in past month
Loading...
Vihibii for Samsung Galaxy S25+ Plus Case Wallet with Card Holder (4 Cards) [RFID Blocking] & Slide Camera Cover, Military Grade Drop Protection, Rugged Back & Silicone Edge Case, 6.7" 2025, Rose Gold

Vihibii for Samsung Galaxy S25+ Plus Case Wallet with Card Holder (4 Cards) [RFID Blocking] & Slide Camera Cover, Military Grade Drop Protection, Rugged Back & Silicone Edge Case, 6.7" 2025, Rose Gold

(174)
$27.99
FREE delivery Sat, Jun 14 on your first order
Loading...
Spigen Case for iPhone 16 Pro Case, Tough Armor [MagFit] Compatible with MagSafe - Black

Spigen Case for iPhone 16 Pro Case, Tough Armor [MagFit] Compatible with MagSafe - Black

(341)
$32.99
FREE delivery Sat, Jun 14 on your first order
Loading...
Spigen Case for iPhone 16 Case, Tough Armor Designed for Apple iPhone 16 - Black

Spigen Case for iPhone 16 Case, Tough Armor Designed for Apple iPhone 16 - Black

(126)
$22.99
FREE delivery Sat, Jun 14 on your first order
50+ bought in past month
Loading...
Spigen Case for iPhone 16 Plus Case, Tough Armor (AI) [MagFit] Compatible with MagSafe - Black

Spigen Case for iPhone 16 Plus Case, Tough Armor (AI) [MagFit] Compatible with MagSafe - Black

(818)
$29.99
FREE delivery Sat, Jun 14 on your first order
Loading...
8BitDo Charging Dock for Xbox Wireless Controllers, Xbox Charging Station with Magnetic Secure Charging for Xbox Series X|S and Xbox One Controller - Officially Licensed (Black)

8BitDo Charging Dock for Xbox Wireless Controllers, Xbox Charging Station with Magnetic Secure Charging for Xbox Series X|S and Xbox One Controller - Officially Licensed (Black)

(281)
$34.99
FREE delivery Sat, Jun 14 on your first order
Loading...
3 in 1 Charging Station for Samsung, Wireless Charger for Samsung S25/S25+/S24/S23/S22/Z Fold/Z Flip Series/Galaxy Watch/Buds Charging Dock Stand(Without Adapter)

3 in 1 Charging Station for Samsung, Wireless Charger for Samsung S25/S25+/S24/S23/S22/Z Fold/Z Flip Series/Galaxy Watch/Buds Charging Dock Stand(Without Adapter)

(3)
$36.99
PrimeFREE delivery Sat, Jun 14
Loading...
Asus ROG Spatha X Wireless Gaming Mouse – MMO/MOBA Design, 12 Programmable Buttons, Right-Handed, 168g, Dual-Mode (Wired/2.4GHz), 19K DPI, up to 67Hr Battery, Magnetic Charging Dock, PC/Mac Support

Asus ROG Spatha X Wireless Gaming Mouse – MMO/MOBA Design, 12 Programmable Buttons, Right-Handed, 168g, Dual-Mode (Wired/2.4GHz), 19K DPI, up to 67Hr Battery, Magnetic Charging Dock, PC/Mac Support

(1,906)
$149.99
FREE delivery Thu, Jan 8
50+ bought in past month
Loading...
3 in 1 Charging Station for iPhone, Wireless Charger for iPhone 16 15 14 13 12 11 X Pro Max & Apple Watch - Charging Stand Dock for AirPods Global Recycled Standard

3 in 1 Charging Station for iPhone, Wireless Charger for iPhone 16 15 14 13 12 11 X Pro Max & Apple Watch - Charging Stand Dock for AirPods Global Recycled Standard

(30,415)
$30.39
Prime
1K+ bought in past month
Loading...
Apple AirPods Pro 2 Wireless Earbuds, Bluetooth Headphones, Active Noise Cancellation, Transparency, Personalized Spatial Audio, High-Fidelity Sound, H2 Chip, USB-C Charging

Apple AirPods Pro 2 Wireless Earbuds, Bluetooth Headphones, Active Noise Cancellation, Transparency, Personalized Spatial Audio, High-Fidelity Sound, H2 Chip, USB-C Charging

(26,678)
$259.99$194.99
FREE delivery Wed, Aug 20
5K+ bought in past month
Loading...
3 in 1 Charging Station for iPhone, Wireless Charger for iPhone 16 15 14 13 12 11 X Pro Max & Apple Watch - Charging Stand Dock for AirPods Global Recycled Standard

3 in 1 Charging Station for iPhone, Wireless Charger for iPhone 16 15 14 13 12 11 X Pro Max & Apple Watch - Charging Stand Dock for AirPods Global Recycled Standard

(30,415)
$30.39
Prime
1K+ bought in past month
Loading...
3 in 1 Charging Station for iPhone, Wireless Charger for iPhone 16 15 14 13 12 11 X Pro Max & Apple Watch - Charging Stand Dock for AirPods (Blue) Global Recycled Standard

3 in 1 Charging Station for iPhone, Wireless Charger for iPhone 16 15 14 13 12 11 X Pro Max & Apple Watch - Charging Stand Dock for AirPods (Blue) Global Recycled Standard

(27,328)
$39.99
PrimeFREE delivery Sat, Jun 14
100+ bought in past month
Loading...
Wireless Charger for iPhone- 3 in 1 Charging Station for iPhone 16/15/14/13/12/Pro Max/Pro/Mini/Plus, Apple Watch 10/9/8/7/SE/6/5/4/3/2/1/Ultra2/Ultra, AirPods pro/2/3/4

Wireless Charger for iPhone- 3 in 1 Charging Station for iPhone 16/15/14/13/12/Pro Max/Pro/Mini/Plus, Apple Watch 10/9/8/7/SE/6/5/4/3/2/1/Ultra2/Ultra, AirPods pro/2/3/4

(27)
$27.99
FREE delivery Sat, Jun 14 on your first order
Loading...
soundcore by Anker Q20i Hybrid Active Noise Cancelling Headphones, Wireless Over-Ear Bluetooth, 40H Long ANC Playtime, Hi-Res Audio, Big Bass, Customize via an App, Transparency Mode, Ideal for Travel

soundcore by Anker Q20i Hybrid Active Noise Cancelling Headphones, Wireless Over-Ear Bluetooth, 40H Long ANC Playtime, Hi-Res Audio, Big Bass, Customize via an App, Transparency Mode, Ideal for Travel

(39,496)
$52.99
FREE delivery Sun, Oct 19
3K+ bought in past month
Loading...
soundcore by Anker Q20i Hybrid Active Noise Cancelling Headphones, Wireless Over-Ear Bluetooth, 40H Long ANC Playtime, Hi-Res Audio, Big Bass, Customize via an App, Transparency Mode, Ideal for Travel

soundcore by Anker Q20i Hybrid Active Noise Cancelling Headphones, Wireless Over-Ear Bluetooth, 40H Long ANC Playtime, Hi-Res Audio, Big Bass, Customize via an App, Transparency Mode, Ideal for Travel

(30,156)
49.98
PrimeFREE delivery Saturday, June 14
500+ bought in past month
Loading...
soundcore by Anker Q20i Hybrid Active Noise Cancelling Headphones, Wireless Over-Ear Bluetooth, 40H Long ANC Playtime, Hi-Res Audio, Big Bass, Customize via an App, Transparency Mode, Ideal for Travel
Amazon's Choice

soundcore by Anker Q20i Hybrid Active Noise Cancelling Headphones, Wireless Over-Ear Bluetooth, 40H Long ANC Playtime, Hi-Res Audio, Big Bass, Customize via an App, Transparency Mode, Ideal for Travel

(30,156)
49.97
PrimeFREE delivery Saturday, June 14
3K+ bought in past month
Loading...
soundcore by Anker P20i True Wireless Earbuds, 10mm Drivers with Big Bass, Bluetooth 5.3, 30H Long Playtime, IPX5 Water-Resistant, 2 Mics for AI Clear Calls, 22 Preset EQs, Customization via App

soundcore by Anker P20i True Wireless Earbuds, 10mm Drivers with Big Bass, Bluetooth 5.3, 30H Long Playtime, IPX5 Water-Resistant, 2 Mics for AI Clear Calls, 22 Preset EQs, Customization via App

(61,759)
$29.99
FREE delivery Sat, Jun 14 on your first order
4K+ bought in past month
Loading...
Girl Moments: Coloring Book for Adults and Teens Featuring Cute Cozy Daily Activities for Relaxation
Best Seller

Girl Moments: Coloring Book for Adults and Teens Featuring Cute Cozy Daily Activities for Relaxation

(5,258)
$11.27
FREE delivery Sun, Jun 29 on your first order
Loading...
SanDisk 4TB Extreme Portable SSD - Up to 1050MB/s, USB-C, USB 3.2 Gen 2, IP65 Water and Dust Resistance, Updated Firmware - External Solid State Drive - SDSSDE61-4T00-G25

SanDisk 4TB Extreme Portable SSD - Up to 1050MB/s, USB-C, USB 3.2 Gen 2, IP65 Water and Dust Resistance, Updated Firmware - External Solid State Drive - SDSSDE61-4T00-G25

(77,138)
$379.99
FREE delivery Tue, Jun 17
100+ bought in past month
Loading...
SanDisk 64GB Extreme PRO SDXC UHS-I Memory Card - C10, U3, V30, 4K UHD, SD Card - SDSDXXU-064G-GN4IN

SanDisk 64GB Extreme PRO SDXC UHS-I Memory Card - C10, U3, V30, 4K UHD, SD Card - SDSDXXU-064G-GN4IN

(71,074)
$21.99$16.59
FREE delivery Sun, Aug 10 on your first order
500+ bought in past month
Loading...
SanDisk 128GB Extreme PRO SDXC UHS-I Memory Card - C10, U3, V30, 4K UHD, SD Card - SDSDXXD-128G-GN4IN
Best Seller

SanDisk 128GB Extreme PRO SDXC UHS-I Memory Card - C10, U3, V30, 4K UHD, SD Card - SDSDXXD-128G-GN4IN

(71,074)
$29.99$26.61
FREE delivery Sun, Aug 10 on your first order
4K+ bought in past month
Loading...
eazpower for Magsafe Power Bank 10000mAh, Magnetic Battery Pack Wireless, 20W PD Fast Charging, Compact Portable Charger with Built-in Cables and Stand for iPhone 16/15/14/13/12/ Apple Watch/Airpods

eazpower for Magsafe Power Bank 10000mAh, Magnetic Battery Pack Wireless, 20W PD Fast Charging, Compact Portable Charger with Built-in Cables and Stand for iPhone 16/15/14/13/12/ Apple Watch/Airpods

(330)
$39.99
PrimeFREE delivery Sat, Jun 14
200+ bought in past month