Russian Army Infantry watch. Here is a link to an excellent site for pictures of various Russian watches. This link goes directly to your watch. Surf through this site for some interesting information.
Hope this helps. I have a book by Juri Levenberg called "Russian Wristwatches, Pocket Watches, Stop Watches, Deck Watches, & Marine Chronometers." It's a reference catalog with tons of pictures. However, I didn't find yours in the book, which is odd as Mr. Levenberg's book is one of the best reference for Russian timepieces.