Seiko Cal. 6630 - 647

The 6630-647 is a sought-after Solar piece from Seiko's golden era. Powered by the 6630 caliber with 28j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-3dc04ada7583]

Also known as: Sumo, Navigator

Specifications

Movement

Solar

Case Material

Titanium

Case Width

43mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Champagne

Jewels

28j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1988

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