German Wilhelm Morell windmesser or anemometer on stand.
This Windmesser or Anemometer Air-speed Indicator or ASI was manufactured by Wilhelm Morell in Leipzig with a scale of 0-55. This particular example has a serial number of 89876. The cups spin and the apparatus appears to be in working order. This windmesser comes with a wood stand painted black and a removable threaded brass rod.