About 9 months ago, I happened on a US watch parts site that provided some identification of Le Coultre (or JLC) parts that were interchangable between two calibers. For example, I believe it cited clutch wheels of the 815 and 825 as the same (although, of course not available). I can't locate this site anymore and I was wondering if anyone can identify it or am I just having a bad dream.
(Aside. Why can't these clutch wheels be reproduced since they appear to be in such high demand and the price of JLC 825s have skyrocketed? The RGM (Roland Murphy) website mentions they can fabricate parts if required; why can't some enterprising soul make these high-demand parts for the market?)
Last question. Are the time-setting /winding stems for the 825 and 815 the same and also the same stems used to set / wind the alarm?
The 815 and 825 are the same movement except the 825 has a date. There is not enough demand for 825s in general to warrant a $10,000 clutch wheel project that is why no one (inlcuding muself) is taking it on.