Seiko Cal. 4428 - 528

The 4428-528 is a sought-after Solar piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-4f755bbaaad3]

Also known as: Sea Horse

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1972

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