Seiko Cal. 5638 - 838

Seiko 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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