Seiko Cal. 6636 - 646

The Seiko 6636-646 represents an important milestone in Seiko's 1994 lineup. Powered by the 6636 caliber with 19j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-c5d686bf499b]

Also known as: Tuna, Crown

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1994

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