Seiko Cal. 4578 - 831

The Seiko 4578-831 represents an important milestone in Seiko's 1989 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-6df5c4aebfd5]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1989

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