Seiko Cal. 5257 - 100

This Automatic model from 1979 features a 40mm Gold-Plated case. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-d74be08aee5f]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1979

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