Bidspirit auction | Antique sifting or grinding machine?

Antique sifting or grinding machine? Patent model? Small critter feeder? Small wooden apparatus with wind up actuator, not tested, not fully understood, 8 1/2” x 10 1/2” x 7” - Antique sifting or grinding machine? Patent model? Small critter feeder? Small wooden apparatus with wind up actuator, not tested, not fully understood, 8 1/2” x 10 1/2” x 7”