Seiko Cal. 4581 - 313

The Seiko 4581-313 represents an important milestone in Seiko's 1978 lineup. Powered by the 4581 caliber with 33j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-b33e7505b858]

Also known as: Sumo, Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Champagne

Jewels

33j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1978

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