There are 6 total stem variations within the lifespan of the Zodiac A Schild based calibers as they progressed from the 70 to the 88D. Some of their differences can be very minor, but it can make a big impact on the setting/winding if the wrong one is used. Additionally, they also made a 2-piece stem for both non-quickset and quick-set.
Last post by stefaninla - August 06, 2022, 10:19:47 PM
Hi Yuriy, I've uploaded a video to youtube, which I think makes the issue viewable. Based on another 72 mainplate that I have, it looks as though the area just below the intermediate gear where the stem end is seated is machined deeper on this mainplate.