Seiko Cal. 6631 - 877

The 6631-877 is a sought-after Solar piece from Seiko's golden era. Powered by the 6631 caliber with 22j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-7a2617db5728]

Also known as: Bellmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

34mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1978

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