Seiko Cal. 6635 - 830

The 6635-830 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6635 caliber with 26j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-af6778dbecf3]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

26j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1995

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