Seiko Cal. 5661 - 688

The 5661-688 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5661 caliber with 36j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-ddacbf2ab335]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Cream

Jewels

36j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1991

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