Ha! yes, of course. In my life I used some of these, but they are dated. CCCP means 'USSR', there is no such a country on the map since 1991.
Oh btw - 3 copecks isnt silver. It is not even a decent copper. It's just some kind of copper-zinc alloy.
ps. all of the finds in your soil are extremely cool, but these two I liked most:
a copper Penny from 1917 and a 1920 silver thruppence, which were called Tickeys here.
the older - the better!
Yes I could see that the kopeck was sort of coppery. At least it isn't a shitty piece of iron with some electroplating, like our new coins. I like the oldest too!
😍