Seiko Cal. 6663 - 950

The 6663-950 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6663 caliber with 23j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-a742cdd96fce]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1990

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