The so-called "Jena" Contaxes made in Saalfeld in 1946-1947 all have a black bezel around the selftimer lever shaft.
There were only three Contax III made there and then so there is very little chance if any for any of them to be on the market now.
The engraving of the accessory shoe looks crude and not machine-stamped.
The leather covering is typical of the Kievs (pattern, color, patina).
The trims black paint gets off the way the paint typically gets off on all early Kievs.
The tripod socket folding foot clearly has the Kiev look, as well as the serrating of the focusing wheel (simple not double).
The screws of the front plate look misaligned (because the genuine Contax frontplate fits on a Kiev casting but there are some slight alignments problems).
If it was a genuine Contax III, it wouldn't have that "Carl Zeiss Jena" engraving on its accessory shoe.
I still think that this is an early Kiev III with a genuine prewar Contax frontplate and a fake accessory shoe.
For more info about the Jena Contaxes, you can read this :
http://www3.telus.net/public/rpnchbck/zconrfKiev.htm