Well, I'm a little fuzzy on these (

) but my guess is that's a 5r surcharge on a 20k Russian. The original stamp was issued in 1910 (SC#82a) and was surcharged in 1922-23 (SC#216).
There is an imperf version as well as perfed, but because I don't have my glasses on (oh, wait, I do!), I can't tell if your stamps are perfed or not. If they are imperf then they would be SC#223.