Seiko Cal. 4584 - 384

This Spring Drive model from 1977 features a 40mm Stainless Steel case. It features a Silver dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-90a5d8cc9ab4]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Silver

Jewels

24j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1977

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