Seiko Cal. 4428 - 726

Released in 1994, the Cal. 4428 with design code 726 was part of Seiko's domestic market collection. It features a Black dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-92ce42bad1c4]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1994

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