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Discussion Starter #1
I recently purchased this nice 4005A Bell. Seller picture.

Now I fitted a replacement Sternkreuz XAG326.533 the original crystal did not have a tension ring. With the new crystal in place and the case back spring fitted the alarm ring is impossible to turn. With the case spring removed the alarm ring turns and there is not really that much play.

My question is are some AM case springs thicker than originals or is the Sternkreuz crystal the culprit here???

Thanks in advance.
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