The stem is pretty interesting, it has a very wide and deep 'v' channel into the stem and the bit is rounded over. The bit also has a horizontal groove cut into it, here's a good view of one of his bits from the side.
The stuff coming out of the Eastern European area is pretty amazing. One day I hope to own a Yashtylov, or Grechukhin.
@CaptainSousie, What takes you to Latvia?