> What kind of characteristics am I supposed to expect from trafos like these?
What kind of dumb guesses do you expect when you don't tell us anything? Can't you even count the wires? Do I have to come over there and look for myself?
They will be about 10K to Speaker. I don't know if Russian hi-fi uses 8Ω speakers or something else. If you don't count the leads, I can't guess if an 8 Watt amp will use SE or P-P connection.
But unless they use some odd speaker impedance, I can't think what they could be good for except the original purpose: 8W tube to speaker.
BTW, I think you could have bought the whole amp and speakers complete for about 20 UK pounds.
Sure looks Japanese to me.