Seiko Cal. 6635 - 509

The Seiko 6635-509 represents an important milestone in Seiko's 1991 lineup. Powered by the 6635 caliber with 23j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-5c6bbe86b6e8]

Also known as: Silverwave

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

White

Jewels

23j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1991

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