Seiko Cal. 5647 - 644

The Seiko 5647-644 represents an important milestone in Seiko's 1990 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-26586681077f]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1990

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