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.
Last post by stefaninla - August 05, 2022, 10:43:19 PM
And... I'm back again. :). I've cleaned and reassembled the 72B movement - that was definitely Franken-watched at one point and I'm working through that.
Problem When the stem is pulled for setting time, the clutch gear doesn't really mesh snugly with the intermediate... it flops around at the end of the stem. Side by side - the stem looks to be the same as stems in two different 72 movements I have.
Question: what is the difference between a 72 stem and a 72B stem and is this an indicator that the stem is incorrect?