Seiko Cal. 5616 - 639

The 5616-639 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-fd8f62dd9af8]

Also known as: Monster, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1990

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