SOLD This excellent example anemometer or medium speed air meter made in England and was used to measure the velocity of the air currents in mines, tunnels, public buildings, etc. The device is made of brass and aluminum and has a nice silvered dial with fourth scales. On the back of the dial there is an on-and-off button engaging the vanes. Dimensions: the diameter of the dial is 60 mm and the wind propeller's diameter is 70 mm and the leather case is 100 mm X 80 mm X 80 mm. The original leather case is in very good condition. The anemometer is still in functioning state.