Here is a sterling bar pin, set with an oval piece of egg yolk amber. By the design of the hinge I would say that it is from either Russia or Poland. It is 2 1/8" long and the amber center is 1/2" wide. It is stamped on the pin stem 925 for sterling with the initials L-K who is probably the jeweler that made it. The swivel clasp works well and is secure. The pin stem is slightly bent but I think this is how it was made. Very nice condition.