Seiko Cal. 6637 - 939

The Seiko 6637-939 represents an important milestone in Seiko's 1968 lineup. It features a White dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-4228d0fc6618]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1968

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