Seiko Cal. 6663 - 653

The 6663-653 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6663 caliber with 31j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-c73c782c0057]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1997

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