Seiko Cal. 5668 - 639

Released in 1974, the Cal. 5668 with design code 639 was part of Seiko's domestic market collection. With its 20mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-dd917af43c44]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

8.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1974

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