Seiko Cal. 5638 - 393

The Seiko 5638-393 represents an important milestone in Seiko's 1988 lineup. Powered by the 5638 caliber with 18j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-9e7c026b7d08]

Also known as: Rally, Emperor

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1988

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