Seiko Cal. 5644 - 766

The Seiko 5644-766 represents an important milestone in Seiko's 1990 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-b5faf866ca50]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

17j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1990

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