In reality the contract was not a Russianicon contract. It was one commissioned by the Britishicon. That is why the left side of the frame is marked in Cyrillic English Order. there were 51,000 made under this English contract. Then the Russians ordered another 15,000 directly from Colt. These are not marked in Cyrillic. Both contracts were in the commercial serial number range. The serial numbers were used at random.