Seiko Cal. 4490 - 556

The Seiko 4490-556 represents an important milestone in Seiko's 1986 lineup. Powered by the 4490 caliber with 17j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-2932008560f8]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1986

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