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Rotating Vane Anemometer For Measuring Wind Force And Velocity By Casella London. This is a 3-inch rotating vane type anemometer with flat vanes that indicates the number of linear feet of air that have passed the instrument during its exposure time. Made by Casella London with serial number c5476 and graduated to 1000 ft. The instrument is new and has not been used. It comes in its original velvet lined hide case. The Casella company was established in 1799 in Holborn, London. |
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