Seiko Cal. 4520 - 683

Released in 1982, the Cal. 4520 with design code 683 was part of Seiko's domestic market collection. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-17cf3719ecec]

Also known as: Sumo, Shogun

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Cream

Jewels

21j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1982

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