Seiko Cal. 5687 - 644

The Seiko 5687-644 represents an important milestone in Seiko's 1981 lineup. It features a Burgundy dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-874a34d0b154]

Also known as: Turtle, Monster

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Burgundy

Jewels

25j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1981

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