Seiko Cal. 5690 - 691

The 5690-691 is a sought-after Hand-Winding piece from Seiko's golden era. With its 19mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-ec980663f614]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1971

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