I found these back in the late 90's still covered in cosmoline. The front pad has the one up and two down hole pattern. I should clean the cosmoline off one set just to see how they look and get a better picture. I was thinking maybe mounted in a clear block of plastic for my desktop.
If anyone has an idea or thoughts on the background of these please reply.
https://www.milsurps.com/images/imported/deleted.gif
Thank's for looking.