Seiko Cal. 6631 - 396

The 6631-396 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6631 caliber with 23j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-cc727d7f7c14]

Also known as: Flighty

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1979

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