This camera is a FED 3b made for Foto-Quelle, West-Germany.
"Revue-3" is engraved on this version; another one exists with serigraphy logo.
It was equipped with Industar-61 zebra.
This camera is not common.
Pictured camera: #8429159
Known serial number range (please extend the range with your serials):
7-digit serial number on the backside of the top:
#8389216(Lenny) to #8459176(Lenny)