Seiko Cal. 0721 - 583

The Seiko 0721-583 represents an important milestone in Seiko's 1965 lineup. It features a White dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-1bb72b72d604]

Also known as: Sumo, Arnie

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

14.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1965

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