Seiko Cal. 0731 - 618

This Quartz model from 1983 features a 37mm Two-Tone case. Powered by the 0731 caliber with 32j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-3a9bf22b644e]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

32j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1983

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