I just thought I'd share my latest acquisition, a lovely Pierce 134 with the single pusher - so probably late 30s. It is small for a chronograph from that era, about 32mm excluding the crown. Yes the position of the sweep hand does annoy me but that can wait until I service it. It gets better - the original box Please excuse the state of my workbench. .....and better still - the original instruction book
I guess there aren't many watchmakers who can work on them since they've been defunct for so long. From what I understand, Pierce had a novel approach to their design.
My understanding is that one of the chronograph wheels is plastic. Replacements are made of unobtanium. If the gear is missing any teeth, your only choice is to find one that didn't break for the same reason. gatorcpa
Here's another perfect example of why a near perfect original part should be used as a pattern to make replacement parts, in this case hopefully from more durable material.
I believe that the part is actually a washer in the chronograph runner assembly. I read, the other day, that you can make one out of sheet silicon rubber but stupidly, I didn't bookmark the web page and can't find it again. Doh.
the washer was originally made out of leather and the clutch-column wheel assembly is unique to Pierce. Rick over at VWF has a watchguy that specialises in Pierce. Drop him a line and he should be able to help.,