Seiko Cal. 6660 - 535

This Hand-Winding model from 1971 features a 40mm Two-Tone case. With its 21mm lug width and 8.1mm profile, it sits comfortably on most wrists. [seikata-wm-473ca143dc85]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1971

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