Seiko Cal. 0721 - 404

This Spring Drive model from 1972 features a 39mm PVD Black case. With its 21mm lug width and 11.9mm profile, it sits comfortably on most wrists. [seikata-wm-d7d97a4ddfa3]

Also known as: World Timer, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1972

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