Seiko Cal. 5660 - 139

The 5660-139 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-ac76ca9361ba]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Cream

Jewels

35j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1993

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