Seiko Cal. 6657 - 945

This Spring Drive model from 1976 features a 36mm Gold-Plated case. It features a Black dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-1920fc7d90ba]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

8.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1976

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