Seiko Cal. 5638 - 838

The 5638-838 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5638 caliber with 19j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-77023e644ef9]

Also known as: UFO, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

43mm

Case Thickness

12.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Champagne

Jewels

19j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1978

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