Seiko Cal. 6631 - 861

The 6631-861 is a sought-after Solar piece from Seiko's golden era. Powered by the 6631 caliber with 27j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-46a797c0cf56]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1993

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