Seiko Cal. 5688 - 891

Released in 1970, the Cal. 5688 with design code 891 was part of Seiko's domestic market collection. The Fixed bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-bb94fbb9f879]

Also known as: Shogun, UFO

Specifications

Movement

Solar

Case Material

Titanium

Case Width

39mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1970

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