Seiko Cal. 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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