Seiko Cal. 5664 - 587

This Spring Drive model from 1979 features a 35mm Hardlex-Coated Steel case. It features a Navy dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-3e5e6175188e]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1979

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