At last, i was able to snag this treasure for a very low price. The Raketa 2209 was produced in a very limited quantity, mainly for small pocket watches. This is the third wristwatch with this movement that i see in four years.
The movement was excellently described by Andrei Babanin on his webpage (http://www.horology.ru/articles/tz2.htm) , and it has a very distinctive layout. In spite of his bad reliability fame, it works perfectly and keeps excellent time. As usual, i can't read the inscription on the caseback
Pics from the seller (good) and from me (bad ).