Seiko Cal. 6630 - 877

The 6630-877 is a sought-after Solar piece from Seiko's golden era. Powered by the 6630 caliber with 20j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-41519debac49]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1977

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