Seiko Cal. 4521 - 139

This Hand-Winding model from 1975 features a 35mm Titanium case. With its 20mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-18ca3b952571]

Also known as: UFO, Flighty

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1975

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