Seiko Cal. 5690 - 381

This Spring Drive model from 1966 features a 38mm Hardlex-Coated Steel case. Powered by the 5690 caliber with 36j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-08054b2bb941]

Also known as: Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1966

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