Seiko Cal. 5618 - 931

This Hand-Winding model from 1969 features a 39mm Stainless Steel case. With its 20mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-4fdc70ecf77e]

Also known as: Samurai, Sumo

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

20j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1969

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