Seiko Cal. 5664 - 539

Released in 1975, the Cal. 5664 with design code 539 was part of Seiko's domestic market collection. With its 21mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-5cfeda8ce94a]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1975

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