Seiko Cal. 6688 - 312

This Spring Drive model from 1988 features a 36mm Hardlex-Coated Steel case. Powered by the 6688 caliber with 20j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-b3a88fbb19a8]

Also known as: Sea Horse, Arnie

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Cream

Jewels

20j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1988

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