Seiko Cal. 5638 - 523

Seiko 5638-523

The 5638-523 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5638 caliber with 28j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-e413323f80ca]

Also known as: Panda, Helmet

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
43mm
Case Thickness
10.3mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
40m
Dial Color
Cream
Jewels
28j
Frequency
28,800 bph
Power Reserve
54 hours
Year
1994

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