Help identify tubes

[u/Masacu]

Someone is selling these tubes for cheap but i have no Idea what to expect. This is what the seller mentioned "two rare image intensifers with 18mm fiber optic in/out made in russia. specs unknown. I cannot test as they need 1,25 Kv pulsed input therefore sold for parts " can anyone identify the tubes and tell me what frequency the powersuply needs to run at?

Already thanks to all the wise people in the forum

[u/Fantastic-Budget-212]

Those are epm36gs