

From dates of other items found in the box its dated (big assumption here) between 1890 and ww2. The Mark from the back that is obscured by the pin clasp just says STERLING. I tried a half dozen pics and this one was the only one where you could make out the mark clearly....
I am pretty sure the letters in the mark are " kcHmo " but searching for that (here and google) came up empty. Thanks for any help and Merry Christmas!