Found in collection. Donor unknown at this time. Found on NASM premises.
Country of Origin: United States of America
Approximate: 2 1/2 x 4 x 2 1/2in. (6.35 x 10.16 x 6.35cm) Drive shalf Approximate base 5x7.5x1
With wind vane ,flex tube and drive shalf, rande 0-15, has attaching metal connecting cord.