Seiko Cal. 6637 - 279

Released in 1971, the Cal. 6637 with design code 279 was part of Seiko's domestic market collection. With its 18mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-b8ca06083fc4]

Also known as: Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

13.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Black

Jewels

23j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1971

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