Reference images

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Hi All
Can someone post or tell me where I can find ref. images for compur 30 ref 12457 with snail track, so I can assess a watch I am looking at.

Thanks
 
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I guess Google?
I have tried that, nothing comes up with a snail tract, but thanks for the suggestion
 
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Why dont you post some pics ;-) I have a lot of them recorded but without a serial it is hard to search
 
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ok, here goes... the number on the mechanism at 9 oclock, what does that refer to? is that the serial number for the 285?

 
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Indeed the movement serial
 
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came across this mono pusher as well, seriously tempted even though the crown does not look right and wondering if it is an early redial? 42mm
Edited:
 
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Can you share a pic of the inside caseback? Porcelain dials often stay very clean
 
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I have asked the seller for the photo, will post it when I have it. the hands are not correct either I think
 
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Then it is a UG movement in an aftermarket case