Seiko Cal. 0731 - 406

The Seiko 0731-406 represents an important milestone in Seiko's 1974 lineup. Powered by the 0731 caliber with 21j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-36f46881eea3]

Also known as: Monster, Bullhead

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1974

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