Gold cased Stone Set Swivel Pocket Watch Key. Circa 1880

This is a long gold cased pocket watch key. At one end is an oval swivel set with a black and white agate stone and a red hardstone on the other side. This shank rotates within the U setting. The key has engraved floral detailing and a suspension loop. The steel winding end is a size 2-3. The key   measures 16mm x 50mm. The key is in 85% mint condition – some wear and tear.