Seiko Cal. 5638 - 398

Seiko 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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