Seiko Cal. 6663 - 820

The 6663-820 is a sought-after Solar piece from Seiko's golden era. Powered by the 6663 caliber with 17j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-e1e474a9ea35]

Also known as: Sea Horse

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Silver

Jewels

17j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1975

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