Seiko Cal. 5639 - 538

Seiko 5639-538

The 5639-538 is a sought-after Quartz piece from Seiko's golden era. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-26685c93a533]

Also known as: Sumo, Baby Tuna

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
41mm
Case Thickness
13.8mm
Lug Width
22mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Cream
Jewels
22j
Frequency
21,600 bph
Power Reserve
67 hours
Year
1985

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seikata-wm-26685c93a533