Seiko Cal. 6637 - 649

The Seiko 6637-649 represents an important milestone in Seiko's 1968 lineup. With its 18mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-44804b4c4aa6]

Also known as: Silverwave

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Champagne

Jewels

27j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1968

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