Seiko Cal. 4428 - 724

The Seiko 4428-724 represents an important milestone in Seiko's 1987 lineup. It features a Silver dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-b12970146afb]

Also known as: Navigator

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1987

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