Right. The annular space between the integrated spacer and the inside of the case needs to be addressed, as well as the space between the case back and the integrated spacer. Not to mention, if there are stem height differences between the Miyota and Seiko movements, that would have to be addressed with a spacer that sits between the dial and rehaut.Ryeguy wrote: ↑Fri Oct 12, 2018 2:08 pmAs a side note, the more I look at the photos, the more I think a custom spacer would have be somewhat more complex than a simple flat ring. If I am seeing things accurately, I think a proper spacer ring would require a lip to fit between the outer edge of the existing Seiko ring and the watch case, then get thick enough to allow the case back to push it forward, creating the "sandwich" to hold the movement securely between the rehaut and the case back. The lack of this lip is what is causing the dial to shift back and for a tiny bit even in Unimatic watches which don't have the auto wind issue.
What a mess.