Seiko Cal. 3861 - 739

This Spring Drive model from 1980 features a 37mm Two-Tone case. It features a Navy dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-d34754c5aaf2]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1980

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