Airforce? silver clasp medal ?

[SlagMaster]

Found this clasp believe it is airforce but cant figure out what it is how it was used.How old? U.S. airforce? It is marked pat pend no d 195005 sterling silver and what looks like ock tag. measures about 1 1/2 inch long.

 

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[fyrffytr1]

Looks like a closure from a metal watch band or maybe a bracelet.

 

[Bruce R]

Yeah, I.D. Bracelet.