Did a google query - looks like they're Junior Brand Russian .22
Here is the site on this ammo:
Any Good? Russian .22 Ammo "Junior" Brand [Archive] - THR
"I'd advise you to stay away unless it's free (or REAL cheap). My brother bought some in the 90s, and I included it when I tested ammo in my 10/22. Of the 16 brands I tried, it performed the worst. It produced 4" groups at 50 yds. I could hear the difference in powder charges, and the vertical stringing proved the inconstancy.
The bullets are very heavily waxed, which isn't necessarily bad, but they tend to gun up mags & actions, and jam fairly regularly, which could be caused by the wax or the light charges. It is also the dirtiest burning ammo I've ever seen, bar none.
I do occasionally use it to plink with through my old rolling block Remington. It appears to be non-corrosive as the old Remington used to see many rounds of that crap with long periods between cleaning.
There is rumor of the steel cases being hard on extractors, especially on 10/22s which have marginal extractors anyway. That is the reason my brother quit shooting it. I don't know if I buy this or not.
Anyway, if you want to buy some, I have about 3K rounds left... I see it fairly regularly at gun shows being sold as "vintage Russian .22 ammo" for the same price as a guy can buy Eley online; I've always wanted to take some & try to sell to the dealers."