Seiko Cal. 6637 - 639

The Seiko 6637-639 represents an important milestone in Seiko's 1984 lineup. It features a White dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-513ac89db72d]

Specifications

Movement

Solar

Case Material

Titanium

Case Width

34mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

White

Jewels

27j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1984

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