I bought this on ebay to help identify loose chrono parts in my collection, but also wanted to document for the forum. I haven't had a chance to study it yet, hopefully some good info here. I think some of this might be in Sala, but it's in French, so I wanted to check the English version.

 

Super cool!!! Thanks for sharing.

 

Thanks Ben. This may come in handy as I have a balky reset on my Compax.

 

Wow. Big thanks, this is unvaluable knowledge – I have sadly encountered watchmakers who weren't capable of repairing some of my 40’s chronos.

 

that a great piece of work by the chicago school of watchmaking ...

 

Finally took a moment to compare my pile of misc chrono parts to the printed repair catalog page. First thing to note is it appears the repair manual parts are printed at life size scale, so you simply lay the part on top of the illustration and it's an exact size match, which helps with identification.

Second thing to note is I ended up with a whole bunch of parts not on the repair page. Probably not all UG but I'm quite sure some of them are. When checking a similar parts diagram in Sala pages 69 thru 74 it is a FAR more extensive list, and I was able to identify more parts there. The trouble with Sala diagrams is they are printed quite small, which makes it hard, and also nothing in English. I would love to see a complete life size parts list in english for all the UG calibers.

So whatever this list of parts is on the repair manual is a small subset, I'm not sure the logic exactly of what's listed or not, perhaps these are commonly replaced parts in repair?

If anyone needs specific chrono parts that you see here, DM me. I will probably just list the whole pile on ebay, but if you catch me before things sell, I can pull individual items.

 

Nice of you to share this!