Here are a couple that you need to watch out for.
Enicar Sherpa Star Divers in Stainless and PVD.
Let's break both of them down
Case // Correct
Case back // Correct
Crown // Correct
Bezel // Correct
Movement // Correct
Bezel inlay // Incorrect
Dial // Incorrect
Hands //Incorrect
You can see a correct version below.
Building these up to the correct spec would be a challenge. The Star Diver hands are unique to this watch so not that easy to obtain. The dial & bezel inlay would also be very difficult to obtain.
The seller does not provide any information concerning the watches but his price is reflecting similar to a fully original Sherpa Star Diver at 2500 Swiss Francs per watch!
You can view the 2 franken watches below
@horology_biology
I totally see what you mean, and this is the joys of learning in our community. The bezel is different but you are totally correct with this different dial. What a find and I’m wondering the seller knows he has prototypes then? Great find man
To be honest, my first reaction was 'franken' too. But I found a mention of these models on Swisstime.ch showing the exact watch. It appears to be a prototype that was presented during the 1970 Swiss Watch Fair. I prefer the appearance of the 'regular' Star Diver though.