Seiko Cal. 6631 - 210

The 6631-210 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6631 caliber with 25j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-fd82fe7d65ab]

Also known as: Sea Horse, Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1997

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