Seiko Cal. 5664 - 688

The Seiko 5664-688 represents an important milestone in Seiko's 1978 lineup. It features a White dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-8f49bb9419a1]

Also known as: Bellmatic, World Timer

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

35j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1978

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