Seiko Cal. 3879 - 521

This Spring Drive model from 1976 features a 39mm Two-Tone case. It features a Black dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-ead3ff764242]

Also known as: UFO, Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1976

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