Seiko Cal. 5261 - 640

The Seiko 5261-640 represents an important milestone in Seiko's 1973 lineup. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-7446b90bb73b]

Also known as: Sumo, Arnie

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1973

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