Seiko Cal. 6644 - 359

This Spring Drive model from 1971 features a 44mm Two-Tone case. It features a Black dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-d85ce6fa6d62]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Black

Jewels

24j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1971

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