It was an N.T.S.C. set (there they say it was from 1962):
http://www.rw6ase.narod.ru/00/twc/raduga_tw62.html
Don't be amased... in Romania we made an N.T.S.C. color experiment in 1964. The 2 sets used in experiment (Japanese sets, one of them have for shore an "R.C.A." 22CYP22A picture tube) are still exist, but now they are behind other stuff... when I took a look of them few years ago there was nothing in front of them...
Uh-oh, I think the Soviet spend some big sum of money for making such pictures tubes. On the link above it's saying that the picture tube is 53ЛК4Ц (53LK4Ţ) and this was a Soviet conding for picture tube (53 = 53 c.m.s.; Ţ = color). The set had 36 electronic tubes.
I don't speak Russian, but I know the alphabet and I'm passioned about old tvs.
On the site is also mentioned (acording to "Google" Translation) that that was a greta number of set manfucatured.