Seiko Cal. 5639 - 903

The 5639-903 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-93ffd6365918]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Green

Jewels

19j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1965

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