Seiko Cal. 5633 - 540

The Seiko 5633-540 represents an important milestone in Seiko's 1975 lineup. Powered by the 5633 caliber with 19j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-baf940fabc9d]

Also known as: Samurai, World Timer

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1975

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