Seiko Cal. 4578 - 251

This Hand-Winding model from 1975 features a 37mm Hardlex-Coated Steel case. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-36b4f7a9ffbf]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1975

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