Seiko Cal. 4556 - 994

The Seiko 4556-994 represents an important milestone in Seiko's 1966 lineup. Powered by the 4556 caliber with 33j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-df180d67876f]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1966

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