A friend of mine came up with a shoulder holster made by Bucheimer.
It is a front break with a flat spring to hold the gun. The only marking on it is the makers stamp and the number “500”.
Looks like it might be for a 2 inch M-10 or a 2.5 inch M-19 or 66. It supposedly belonged to a Secret Service agent.
The leather is in good shape though it needs some TLC and it is missing the elastic band for the off shoulder.
Looking to confirm what revolver it was made for and the aprox. value.
Edited to add picture. (stock picture- the one I'm asking about has no elastic strap.)