Seiko Cal. 6643 - 521

This Quartz model from 1977 features a 37mm Hardlex-Coated Steel case. It features a Champagne dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-029b48ef7261]

Also known as: Navigator, Golden Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Champagne

Jewels

33j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1977

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