Seiko Cal. 5646 - 840

This Spring Drive model from 1979 features a 38mm Two-Tone case. It features a Green dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-6cdf12857645]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1979

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