Seiko Cal. 5633 - 487

The Seiko 5633-487 represents an important milestone in Seiko's 1973 lineup. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-aced6f2c87e0]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1973

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