Seiko Cal. 0720 - 657

The Seiko 0720-657 represents an important milestone in Seiko's 1971 lineup. Powered by the 0720 caliber with 26j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-dee731df6c6e]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Green

Jewels

26j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1971

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