Seiko Cal. 3820 - 704

Released in 1975, the Cal. 3820 with design code 704 was part of Seiko's domestic market collection. It features a Green dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-f72481ea159c]

Also known as: Sumo, Silverwave

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

34j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1975

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