I see doubling on image 456, 459 and 461 and the dot on 462.
The doubling looks like a pressure problem, making the die jump. This is a reasonably common occurrence on coins struck in great haste or in very large quantities. The doubling here is not enormous and may be difficult to see with the coin in hand. The dot is likely a small pit on the die, maybe from a dropped tool or a moment of inattention with an engraving tool, maybe a spot of rust on the die that has been cleaned away.
The Russian coin scene is changing fast, so I don't know what the situation is now. In the past, there would have been little demand for error coins and people would have concentrated on patterns instead.
Peter