Around about 1979, when his grandson (my son) Paul was 4, Dad came to me with something he thought I may enjoy sharing with Paul. He said it was sold to him at an army surplus store, represented as part of the aiming system for a bomb sight from a WWII era B-29 bomber.
It was a high quality optical prism.
So this week I will send this to my son, Paul, in case he may enjoy sharing it with his son, Nolan.
|7" High Prism|
|Roy G. Biv !|