Welcome!

Classic watches, watchmaking, antique tools, history, vintage ephemera and more!

Learn about mechanical timepieces and how they work, the history of the American watch industry and especially all about the Elgin National Watch Company! Check back for new content daily.

Although this is technically a blog, the content is not generally in a time-based sequence. You can find interesting items throughout. Down the page some is an alphabetical word cloud of keywords used here. A great way to dig in is to look through those topics and click anything you find interesting. You'll see all the relevant content.

Here are a few of my favorites!

There are some large images on some posts, so that might impact your load times, bit I think you will find it worth the wait. Thanks for visiting!

Hairsprings and Grease Don't Mix

There was grease, that had turned to putty as grease does, packed into the inner most coils of the hair spring.  Meticulous cleaning by hand is the only way to get it out.


If the coils of the hairspring do not expand and contract evenly and smoothly, if they touch at all, then the spring becomes effectively much shorter.  The spring behaves as a pendulum, so a much shorter spring reduces the period of the balance wheel and the watch runs very fast.  Magnetism can do this to a spring too by causing coils to stick to each other when they're close.  Gaining several minutes per hour is not unusual when this is the trouble.

This is an Elgin grade 345, a 12 size, 17 jewel movement.  This example was made about 1920.

Post a Comment

Click "Older Posts" just above for more, or use the archive links right here.

Blog Archive