Seiko Cal. 4581 - 920

The Seiko 4581-920 represents an important milestone in Seiko's 1969 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-b0ad29ae9721]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

8.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1969

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