
Up for auction is this fine, Vintage, mystery pin.
This badge features a top, unmarked name bar from which hangs a triangle bearing the letters OMA in black enamel.
This pin weighs 2.2 grams and measures 1 5/32" (29mm) tall.
The seal or emblem of the KOH was a shield, depicting a knight with his shield arm raised. On the main shield was a triangle with the letters O.M.A.

pb11 said:I found a triangle with an O at the tip ,M at the left corner and an A at the right corner. the triangle is pointing up . There is a shield in the middle of the triangle . Any thoughts ??

Was going to move this to What Is It but guess I don't have to. 