I just zoomed in a bit on the picture - the indices also don't look like they are evenly spaced in a few places. This could be from the curve of the crystal, but it's impossible to say without more pictures. Additionally, it looks like the case has been heavily polished in the past.
I wouldn't trust the crowd on eBay to be able to identify an original (dial/case/anything). With vintage watches exploding in value, there are hordes of uneducated people dumping money on things that are not original.
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