Seiko Cal. 4556 - 987

Released in 1985, the Cal. 4556 with design code 987 was part of Seiko's domestic market collection. Powered by the 4556 caliber with 17j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-862bfcada358]

Also known as: Helmet, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

17j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1985

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