You are looking at a Nautical Fan Anemometer And Wind Vane Sensor . This anemometer was made in Bergen Norway in October, 1992. You will see that information on the front on a plaque.
This piece is made out of solid brass. The fan anemometer and its propeller both spin freely. On the propeller you will see some paint which looks like it was splattered on it by mistake.
This is a beautiful, nautical item has a real vintage look and would be a great addition to any nautically themed room!
Propeller Diameter: 13″
Base Diameter: 5.5″
Base Mounting Holes: 4
Weight: 16.5 lbs.