Seiko Cal. 5665 - 931

This Spring Drive model from 1974 features a 40mm PVD Black case. It features a Burgundy dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-9420b5abb717]

Also known as: Monster, Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

28j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1974

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