Seiko Cal. 5633 - 398

The Seiko 5633-398 represents an important milestone in Seiko's 1980 lineup. Powered by the 5633 caliber with 33j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-1cb3f7dc8870]

Also known as: Helmet, Rally

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1980

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