Seiko Cal. 3891 - 720

This Automatic model from 1966 features a 46mm Gold-Plated case. Powered by the 3891 caliber with 26j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-a5454f0db2c0]

Also known as: Bullhead, Arnie

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

13.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

26j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1966

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