Seiko Cal. 4581 - 278

This Hand-Winding model from 1993 features a 45mm Hardlex-Coated Steel case. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-3bd15ba54604]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1993

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