I believe this pin was made in the 1920's and the jade is from old Chinese court jewellery. The pin is 1 1/2 inches by 7/16 inch. It is quite thin at 1.3mm. The carving is really beautiful and the metal is not marked but tests positive for silver. It has been gold gilded. The pin catch it a trombone style. Condition is good with normal wear to the gilt.