200pz Gomma di Ricambio 0.5mm 0.6mm O-ring Orologio Rondella Impermeabile Lavatrice B
The rubber O-ring watch washer is used to keep the watch waterproof. 7.1CM Watchmaker's Repair Tool Second Hand Remover Lifter Puller For ETA 7750. A perfect substitute for the sealing gasket of the watch back cover.