Seiko Cal. 6637 - 138

The Seiko 6637-138 represents an important milestone in Seiko's 1967 lineup. It features a Cream dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-d70a39ef168d]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Cream

Jewels

35j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1967

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