Seiko Cal. 5646 - 337

This Spring Drive model from 1979 features a 36mm Hardlex-Coated Steel case. Powered by the 5646 caliber with 30j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-1ff4dbdb66d6]

Also known as: Turtle, Shogun

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

30j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1979

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