Seiko Cal. 6637 - 719

This Spring Drive model from 1983 features a 34mm Stainless Steel case. With its 18mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-5671e24b182b]

Also known as: UFO, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

22j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1983

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