Seiko Cal. 6634 - 163

The Seiko 6634-163 represents an important milestone in Seiko's 1987 lineup. Powered by the 6634 caliber with 18j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-0f6c88c35a7e]

Also known as: Rally, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1987

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