Seiko Cal. 4421 - 764

The Seiko 4421-764 represents an important milestone in Seiko's 1986 lineup. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-3aeadd570bbe]

Also known as: Sumo, Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1986

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