Seiko Cal. 4550 - 197

The Seiko 4550-197 represents an important milestone in Seiko's 1977 lineup. Powered by the 4550 caliber with 25j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-432ff4e7a89c]

Also known as: Bullhead, Emperor

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

45mm

Case Thickness

8.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

25j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1977

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