Seiko Cal. 5633 - 650

The Seiko 5633-650 represents an important milestone in Seiko's 1990 lineup. Powered by the 5633 caliber with 27j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-9c7932ca6868]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

27j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1990

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