Seiko Cal. 0721 - 590

Released in 1970, the Cal. 0721 with design code 590 was part of Seiko's domestic market collection. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-17bf924cb8c1]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

39mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Cream

Jewels

30j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1970

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