Seiko Cal. 3818 - 721

This Spring Drive model from 1979 features a 34mm Hardlex-Coated Steel case. It features a Navy dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-85d47fd72ea1]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1979

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