Seiko Cal. 3890 - 660

This Spring Drive model from 1965 features a 39mm Titanium case. With its 18mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-e4724993c37f]

Also known as: Turtle, Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1965

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