Seiko Cal. 0720 - 578

Released in 1972, the Cal. 0720 with design code 578 was part of Seiko's domestic market collection. It features a Silver dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-7bb3ce551115]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

24j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1972

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