Seiko Cal. 5663 - 351

This Spring Drive model from 1977 features a 40mm Stainless Steel case. With its 21mm lug width and 11.9mm profile, it sits comfortably on most wrists. [seikata-wm-092b4389d833]

Also known as: Samurai, Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

11.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Silver

Jewels

35j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1977

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