Seiko Cal. 3887 - 557

This Automatic model from 1981 features a 45mm Two-Tone case. Powered by the 3887 caliber with 30j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-6dae989d2ff5]

Also known as: Sumo, Arnie

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

30j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1981

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