It is the same camera as Zorki-11 but with Zenit branding. It is extremely hard to find. Need to mention, that protype version of particular camera had Zenit Junior markings below the finder's window!
Serial Number Known:
#6600113 seen Molotok
#6600117 okynek
#6604685 seen on Leica Shop (2004)
#6606634 SovietCams
#6605670 Omega