Seiko Cal. 6643 - 337

This Quartz model from 1977 features a 38mm Titanium case. It features a Navy dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-c5da7ace551c]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

38mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1977

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