Seiko Cal. 5638 - 415

The 5638-415 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5638 caliber with 33j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-919228cc5abb]

Also known as: Turtle, Goldfeather

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

33j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1968

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