Seiko Cal. 5656 - 818

This Spring Drive model from 1977 features a 44mm Stainless Steel case. It features a Burgundy dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-ff3748d803d5]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

21j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1977

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