Seiko Cal. 5633 - 963

The Seiko 5633-963 represents an important milestone in Seiko's 1977 lineup. Powered by the 5633 caliber with 18j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-aafae2540f7e]

Also known as: Helmet, World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1977

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