Seiko Cal. 0728 - 399

This Spring Drive model from 1992 features a 40mm Stainless Steel case. It features a Cream dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-365a42e3f9d2]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Cream

Jewels

24j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1992

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