Seiko Cal. 5691 - 536

This Spring Drive model from 1978 features a 40mm PVD Black case. With its 21mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-4ca817ff29f7]

Also known as: Silverwave, Goldfeather

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1978

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