Seiko Cal. 5627 - 644

The Seiko 5627-644 represents an important milestone in Seiko's 1973 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-3bc52e7cc20b]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1973

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