Seiko Cal. 6631 - 855

The 6631-855 is a sought-after Solar piece from Seiko's golden era. Powered by the 6631 caliber with 21j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-74d8759ff015]

Also known as: Panda, Bellmatic

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1981

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