Seiko Cal. 5638 - 398

The 5638-398 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5638 caliber with 26j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-96c56dbbcd9e]

Also known as: Tuna, Flighty

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

26j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1982

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