Let me put it this way, enameling was more or less Moscow’s business. The initials in the kokshnik mark on your cup show Ð¯Ð›. That is the assayer Jakov Ljapunov and guess what, he was never in Moscow but in St Petersburg.
Another thing is that both the kokshnik mark and the maker’s mark are badly punched aslant on a plain surface! I could understand that regarding the hallmark because the assayer did not care about it. He hit hundreds of marks every working day like on a conveyor belt. But I have difficulties in understanding that regarding the maker’s mark. You could ask why is it aslant? Didn’t the maker like to inform the prospective buyer who has made the object? Of course he did, and punched a nice and clearly readable mark. It was his trademark and ad as well.
But now it is aslant on your object. Maybe this is the reason: The maker, whoever it is, doesn’t want to be identified with certainty. Now ask your self: Who wants that and why? Time for conclusions….