Seiko Cal. 4520 - 225

The Seiko 4520-225 represents an important milestone in Seiko's 1971 lineup. With its 21mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-1a7c5e699c22]

Also known as: Sumo, Flighty

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

22j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1971

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