Imperial Russia Ring?

Hi All, i am hoping that you can help identify if this is a ring made for a regiment of some sort during the Russian Empire reign?

It’s got "50" on left side, crown in the middle and "кп" on the right side. Inside, it has the name of the owner…i guess. a mint mark what appears to be a triangle.

I am curious as to what 50кп stands for, if it does at all?


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