Seiko Cal. 6610 - 764

This Spring Drive model from 1977 features a 44mm Hardlex-Coated Steel case. With its 19mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-25ac5a473ba5]

Also known as: UFO, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

White

Jewels

22j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1977

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