Hello all. I just recently picked up another Soviet piece for the collection, as I've really been enjoying their designs. However, upon looking at the reverse with my magnifier, I noticed that inside the shield were faint lines behind the 20. It looks like the globe and sunburst designs that make up the Soviet state emblem. I've added a closeup of the coin for reference below.
I'm guessing it's just ghosting as a result from worn dies, like you see on George V coins. Any confirmation/clarification would be great, thanks!