Need help with coin

Hello to everyone here.
This 1 ruble have a smooth edge.
Can not find anything about this.
Thank you for your help.
Eyal

Just like the coin which is discussed in this forum post, your ruble is probably filed down to make it pass for something else.

Unfortunately, I don't have an answer to the key question: is there a 20mm diameter coin of considerably higher exchange value for which this filed ruble could pass?

Thank you for your answer.
I will look for the thing that you said.