"Opera" Length Necklace Watch

Boho antique finish pocket watch "opera" necklace. It hangs at around the diaphragm, the chain alone hangs at 17 in., and the pendant itself adds approximately 1.5 in. Needs new battery: guessing a V377 It was a gift, not sure what brand it really is or original price. *Message me any questions! Ceramic plate not included.