Seiko Cal. 5638 - 662

Seiko 5638-662

The 5638-662 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5638 caliber with 21j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-b76fd8e77903]

Also known as: Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
38mm
Case Thickness
12.0mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
80m
Dial Color
Cream
Jewels
21j
Frequency
36,000 bph
Power Reserve
62 hours
Year
1986

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seikata-wm-b76fd8e77903