Seiko Cal. 6647 - 654

This Spring Drive model from 1972 features a 44mm Two-Tone case. It features a Champagne dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-09dda998b27c]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

19j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1972

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