Seiko Cal. 4431 - 734

The Seiko 4431-734 represents an important milestone in Seiko's 1978 lineup. Powered by the 4431 caliber with 25j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-73c15c2c70a6]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

45mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

White

Jewels

25j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1978

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