Seiko Cal. 5660 - 724

Released in 1988, the Cal. 5660 with design code 724 was part of Seiko's domestic market collection. Powered by the 5660 caliber with 22j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-8dd21541bb24]

Also known as: Sumo, Tuna

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

90m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1988

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