Seiko Cal. 4461 - 640

The Seiko 4461-640 represents an important milestone in Seiko's 1999 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-c16d25fd889f]

Also known as: Sumo, Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Champagne

Jewels

36j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1999

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