Seiko Cal. 5665 - 523

This Spring Drive model from 1976 features a 45mm PVD Black case. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-18b1ce97fce1]

Also known as: Monster, Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1976

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