Seiko Cal. 5644 - 731

This Hand-Winding model from 1992 features a 36mm Hardlex-Coated Steel case. With its 18mm lug width and 14.1mm profile, it sits comfortably on most wrists. [seikata-wm-4c364fa6b2bc]

Also known as: Samurai, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Black

Jewels

36j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1992

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