I don't think the company is still in business. I was able to find this website:
http://timedesign.de/dir.html#P
It shows the following: "Perroh >> Frank Dilbakowski"
From what I can tell, Mr. Dilbakowski owned many trademarks. Most are defunct, a few are still around.
My guess is there is a generic manual wind movement inside. Probably a Unitas with some minor modifications.
Hope this helps,
gatorcpa
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