Seiko Cal. 5643 - 866

This Hand-Winding model from 1972 features a 40mm Two-Tone case. With its 20mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-5b94e3ddc83c]

Also known as: Samurai, Monster

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

30j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1972

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