Seiko Cal. 6663 - 991

The 6663-991 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6663 caliber with 28j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-2777ecf722e3]

Also known as: Samurai

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1999

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