Seiko Cal. 5638 - 552

The Seiko 5638-552 represents an important milestone in Seiko's 1983 lineup. Powered by the 5638 caliber with 20j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-7fca36ed152c]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

8.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1983

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