Seiko Cal. 5680 - 921

This Spring Drive model from 1965 features a 41mm Hardlex-Coated Steel case. With its 20mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-ab9af8d2fbc2]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1965

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