Seiko Cal. 4433 - 640

The Seiko 4433-640 represents an important milestone in Seiko's 1983 lineup. Powered by the 4433 caliber with 27j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-3b74d71b159d]

Also known as: Helmet, Emperor

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1983

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