Seiko Cal. 7031 - 421

Seiko 7031-421

The Seiko 7031-421 represents an important milestone in Seiko's 1980 lineup. Powered by the 7031 caliber with 33j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-231bd8afef4a]

Also known as: Monster

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
12.6mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
140m
Dial Color
Black
Jewels
33j
Frequency
21,600 bph
Power Reserve
63 hours
Year
1980

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seikata-wm-231bd8afef4a