Seiko Cal. 5666 - 961

This Spring Drive model from 1969 features a 42mm Gold-Plated case. It features a Navy dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-f0092e0be8d4]

Also known as: Monster, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Navy

Jewels

32j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1969

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