This ultra rare camera was the first belorussian's attempt to issue an "Elite" type camera. Although cameras under name "Zenit-15M" are quite common nowadays, this conceptional version has great sequence of shutter speeds 1s - 1/1000s + B and is identical to another belorussian's conceptional camera, under name "VIZIT". I have had an opportunity to compare this Zenit-15M with genuine "Vizit" one and can confirm personally, that they are two sisters indeed. Even the serial numbers were almost identical with the last numbers different in fact.
The late Zenit-15M cameras has different export markings on the frontplate and shutter with 1/30s-1/500s (see chapter "Modern Zenits from Belarus".