Seiko Cal. 4427 - 137

The Seiko 4427-137 represents an important milestone in Seiko's 1972 lineup. Powered by the 4427 caliber with 31j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-ffe0c8eee3ea]

Also known as: Monster, World Timer

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

34mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1972

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