These uncommon cameras were first belorussian's attempt to issue an "Elite" type camera. Although cameras under name "Zenit-15M" are quite common nowadays, this conceptional version had great sequence of shutter speeds 1s - 1/1000s + B and is identical to another 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.