Seiko Cal. 4442 - 631

The Seiko 4442-631 represents an important milestone in Seiko's 1987 lineup. Powered by the 4442 caliber with 33j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-2ecc8e9dc5ce]

Also known as: Shogun, UFO

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1987

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