The Patina and Plexi Seiko 6159-7001 Protocol: Evaluating the 300m Hi-Beat Monobloc
The Patina and Plexi Seiko 6159-7001 Protocol Patina and Plexi Executive Summary: Released in 1968, the Seiko 6159-7001 is a 300m professional diver defined by its front-loading monobloc case and the 36,000 bph Caliber 6159A movement. Current market valuations range from £5,000 for worn examples up to £9,000+ for pristine originals. Buyers must verify the…