Seiko Cal. 3891 - 907

This Spring Drive model from 1968 features a 39mm PVD Black case. Powered by the 3891 caliber with 30j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-7073e326f090]

Also known as: Samurai

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1968

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