Seiko Cal. 6656 - 446

This Spring Drive model from 1969 features a 36mm Stainless Steel case. It features a Navy dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-3dadfae4eefd]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1969

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