Seiko Cal. 4438 - 768

The Seiko 4438-768 represents an important milestone in Seiko's 1979 lineup. Powered by the 4438 caliber with 21j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-a08e1b47efa2]

Also known as: Sumo, Navigator

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1979

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