Seiko Cal. 5638 - 417

The 5638-417 is a sought-after Hand-Winding piece from Seiko's golden era. The Fixed bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-38ae302ac63e]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Black

Jewels

27j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1965

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