Seiko Cal. 4438 - 283

The Seiko 4438-283 represents an important milestone in Seiko's 1967 lineup. Powered by the 4438 caliber with 20j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-de5243269a11]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

14.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1967

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