Seiko Cal. 3891 - 630

This Automatic model from 1987 features a 42mm Two-Tone case. Powered by the 3891 caliber with 33j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-d2e178babda5]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Champagne

Jewels

33j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1987

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