Seiko Cal. 6331 - 398

Seiko 6331-398

Released in 1969, the Cal. 6331 with design code 398 was part of Seiko's domestic market collection. Powered by the 6331 caliber with 18j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-8076c8897535]

Also known as: Monster, Sportsmatic

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
45mm
Case Thickness
11.3mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Black
Jewels
18j
Frequency
36,000 bph
Power Reserve
60 hours
Year
1969

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seikata-wm-8076c8897535