Seiko Cal. 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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