Seiko Cal. 3891 - 304

This Hand-Winding model from 1970 features a 36mm PVD Black case. Powered by the 3891 caliber with 22j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-5ef1cd5ebf01]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1970

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