Montana Jim said:It's a bag, purse, or knapsack closure...
At least thats what I can tell from your pictures.
Montana Jim said:I found this picture...
Hello Guy.vayank54 said:I agree with the others, it's a turn stud button. The shoulder scale piece would be shorter had have flat piece at the end with small holes around it so it could be sown onto the uniform.
The first shoulder scale piece I dug like that was missing the flat part that was sewed to the uniform. I thought I had part of a guitar for along time.