Seiko Marinemaster 7C46-0AL0

Seiko Reference 7C46-0AL0 Marine Master Prospex | A limited edition stainless steel, ceramic, and titanium wristwatch with date, Circa 2018

Dial: black Caliber: Cal. 7C46 quartz, jeweled Movement number: Case: stainless steel, ceramic, and titanium, case back secured by four screws Case number: 0042/1978 Closure: Seiko buckle Size: 49mm diameter Signed: case, dial, and movement Box: yes Papers: yes Accessories: Seiko Certificate of Guarantee dated September, 2018, instruction manuals and booklets, hang tagsIn 1975, a professional diver from Hiroshima challenged Seiko to create a watch capable of withstanding depths greater than 300 meters. The result was the world’s first titanium-cased diver’s watch, a milestone in underwater timekeeping. To commemorate the 40th anniversary of this achievement, Seiko reissued the model with updated materials and technology. Produced in a limited edition of 1,978 pieces, the present example is numbered 42.