In the 1950s and 60s many hunters looked on the scope as an unreliable gimmick.
Weaver was turning out their K model scopes, especially the K2.5 and the K4 in great numbers and to satisfy those hunters who were leery of scopes, they developed the pivot mount and the see through rings, to enable a hunter to quickly revert to iron sights.
I consider the see through as being close to a catastrophe, because the scope is mounted too high to be comfortable, or an efficient sighting arrangement. I have bought the odd rifle with see through rings on it and I take them off and throw them in the junk box, even before I shoot the rifle.
On a good day, I consider the tip off, or pivot mount, to be a bit better than the see through variety.