ClockSavant Watch Collecting, Servicing, & Repair Blog

Servicing the Seiko 6138-0030 Kakume Chronograph JDM Speedtimer

Servicing the Seiko 6138-0030 Kakume Chronograph JDM Speedtimer

by Eric Greenberg
This 1970’s Seiko 6138-0030 Kakume JDM Speed-timer chronograph was fully serviced by me for watchmodperfect, a prolific Seiko collector and enthus...
Caring for Vintage Watches

Caring for Vintage Watches

by Eric Greenberg
I’ve been asked several times by customers to provide input on caring for vintage watches. The Support section of the website and related FAQ provi...
Servicing a Seiko 6138 Bullhead Automatic Chronograph - Observations on Vertical Clutch and Hour Register

Servicing a Seiko 6138 Bullhead Automatic Chronograph - Observations on Vertical Clutch and Hour Register

by Eric Greenberg
You are looking at a fully disassembled vintage 1970’s Seiko 6138 bullhead chronograph on my bench being serviced. This is a complicated column wh...
Successful Long-Term Watch Collecting

Successful Long-Term Watch Collecting

by Eric Greenberg
Several decades ago when I became obsessed with watches, clocks, and horology overall, I would sometimes criticize myself for the purchasing I did....
Tissot Omega 33.3 Lemania 15TL Coming Soon

Tissot Omega 33.3 Lemania 15TL Coming Soon

by Eric Greenberg
The Omega 33.3 Lemania 15TL calibre is one of the most quintessential vintage chronograph movements ever made. It is on my bench today to be fully ...
Gremlins- the re-pivoted balance staff

Gremlins- the re-pivoted balance staff

by Eric Greenberg
What you are looking at in the top image is the top pivot of a vintage watch balance that was re-pivoted a long time ago by a watchmaker who worked...
Servicing the Gruen 711CD Vintage Watch

Servicing the Gruen 711CD Vintage Watch

by Eric Greenberg
Gruen, like so many watch manufacturers, had a long history of ups-and-downs but for the most part maintained a strong quality focus. Their founder...
Watch timing and accuracy - Static vs Dynamic Poising - Balance Wheel Poising

Watch timing and accuracy - Static vs Dynamic Poising - Balance Wheel Poising

by Eric Greenberg
The first picture shows a watch balance on a watchmaker poising tool, a tool used to statically determine the evenness of watch balance wheel weigh...
Cheap, quick, and dirty complicated vintage chronograph servicing!

Cheap, quick, and dirty complicated vintage chronograph servicing!

by Eric Greenberg
Here we have yet another fouled hairspring, they surface on the majority of vintage chronographs I service. This watchmaker was cheap, he “serviced...
Bringing a vintage watch back to life- hairspring pinning

Bringing a vintage watch back to life- hairspring pinning

by Eric Greenberg
A vintage watch without a correct hairspring is no longer a watch— it’s parts. If a hairspring is damaged beyond repair or incorrect (aka a past wa...
Servicing Considerations for Hahn Chronographs (Pre-Landeron)

Servicing Considerations for Hahn Chronographs (Pre-Landeron)

by Eric Greenberg
Hahn and Landeron evolved to become one company. Despite innovating the cam-based chronograph design, they also owned the original column wheel chr...
Jacot Tool - Pivot Polishing

Jacot Tool - Pivot Polishing

by Eric Greenberg
This is a specialized tool used to polish watch pivots called a Jacot tool or Jacot lathe. Significant pivot wear and corrosion can greatly impact...