Seiko Cal. 3856 - 643

This Hand-Winding model from 1975 features a 40mm Hardlex-Coated Steel case. With its 18mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-32f2174f744c]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1975

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