Seiko Cal. 4577 - 285

This Spring Drive model from 1967 features a 42mm Hardlex-Coated Steel case. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-e416794c8a48]

Also known as: Bullhead, Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1967

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