Seiko Cal. 0731 - 201

The Seiko 0731-201 represents an important milestone in Seiko's 1967 lineup. Powered by the 0731 caliber with 24j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-a17a1d2c5607]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

12.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

24j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1967

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