Seiko Cal. 3887 - 503

This Spring Drive model from 1982 features a 35mm Two-Tone case. It features a Navy dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-c18be323badc]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1982

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