Seiko Cal. 5688 - 636

The 5688-636 is a sought-after Solar piece from Seiko's golden era. Powered by the 5688 caliber with 20j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-f8af7202c6ba]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1994

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