Hi Mike et. al.:

My beef with the weaver K4 scope and the other Weaver scopes of that period was the lack of a anti reflecting coating on the lenses. Other scopes were brighter and without the annoying "flare" inside the scope I would see if I were aiming towards the Sun. One other thing that I noticed with the Weavers was that while hunting in bright sunlight, I could see the reflection on my eye/face in the eyepiece. Very distracting!

When I went scopes like Lyman,Redfield, Kollmorgen and Leupold, I did not have these problems. They were brighter and more user friendly. Even the Bushnells were brighter.

Perhaps this answers your question.

The K4 probably outsold all other scopes combined in the 50's.

Stay well,

Zeke