Thats an interesting 105.012-66CB.
Tells are the short squat pushers, which are original with fat necks and we can see the facet lines on at least to of the lugs.
I would also suggest it needs a service - look at the position of the hour counter which has not re set.
The dial looks a little tired, with algae coloured plots which are not desirable, but they are there
The dial appears to have a short spaced T marks. So all looks good as far as originality - in fact it appears very original.
That being said, I would not buy this just on this photo - but it is a great help in identifying.
For me its all about the dial. I would choose a watch based first on the dial. Then the reference. And in this case it wouldnt take much to beat this dial unless its rotten.
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