Seiko Cal. 3872 - 636

This Spring Drive model from 1970 features a 35mm Titanium case. Powered by the 3872 caliber with 22j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-28ade1836d89]

Also known as: Bellmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1970

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