Seiko Cal. 4520 - 227

The Seiko 4520-227 represents an important milestone in Seiko's 1977 lineup. Powered by the 4520 caliber with 31j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-42008c6c7fd9]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

8.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1977

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