That is a so-called "precision" version of the 2609.HA movement, 2609.ПР. I've never heard a convincing reason for why it is more precise, but I believe it has something to do with the metal used in the balance hair spring. However, that one's had its balance replaced so I guess it's a moot point. Several Raketa models had the ПР movement standard. I believe the one best known is the Copernicus.
Here are a bunch from an '85 catalog: