Seiko Cal. 7031 - 153

Seiko 7031-153

The Seiko 7031-153 represents an important milestone in Seiko's 1975 lineup. Powered by the 7031 caliber with 25j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-4b0e156e7be4]

Also known as: Monster, Bellmatic

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
9.3mm
Lug Width
19mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Black
Jewels
25j
Frequency
28,800 bph
Power Reserve
59 hours
Year
1975

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