Seiko Cal. 5637 - 659

The Seiko 5637-659 represents an important milestone in Seiko's 1979 lineup. It features a Green dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-73eb6aa2b5fb]

Also known as: Sea Horse, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1979

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