Seiko Cal. 6656 - 671

This Spring Drive model from 1982 features a 34mm Hardlex-Coated Steel case. It features a Silver dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-2219e08f79a1]

Also known as: Helmet, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Silver

Jewels

30j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1982

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