Seiko Cal. 0720 - 540

The Seiko 0720-540 represents an important milestone in Seiko's 1977 lineup. The Bidirectional bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-b3548825ca54]

Also known as: Sumo, Rally

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1977

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