Seiko Cal. 5639 - 242

The 5639-242 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-6a92bbe14289]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

10.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1983

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