Mike, do you have any idea, how to open them?
Do they have to be opened through the glass?
Got the same one a couple of weeks ago:
No clue to be honest, I a missing a slit for a watchmaker´s knife.
the inner case has simple push back. You can lift off the back with any opener
beween kitchen knife and professional equipment.
Regards, Roland Ranfft
Got it opened. The first time I tried, I just wasn't brave enough.
Here's my shot of the "inside":
(I found it already in your great database)
Ronda Cal. 1223-21, pin pallet escapement, modular alarm movement, alarm module dial-side, separate mainspring for the alarm, also made in a swiss lever version (Cal. 1243-21) and in an automaic version (Cal. 1226). But then, as you said, you probaby found all that out already from Roland Ranfft's database!
If you´re interested in wrist alarm watches, read "Der Armbandwecker - Die Geschichte einer unterschätzten Komplikation". Pics of the Swiss Emperor are in there too. ISBN: 3-89880-003-2
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