I've had those prints for years. They came with matting but no standard frames fit it.
A few years ago I was in a store that sold frame mats made from old maps. I thought, that's brilliant!
So I finally did it myself after picking up a couple frames on Tuesday.
Oddly, I couldn't find the maps that I know I set aside for this purpose.
But I found another old map that worked. Notwithstanding Putin's desires, I don't think the USSR is coming back. So I could safely ditch that map.
Now. Where to hang them?