Base and motor for the photoelectric number sieve machine
Object consists of a base with a motor mounted on it, an unidentified cover, and a plastic bag containing some sort of fastener.
D. H. Lehmer / Robert Canepa
||Type number on the motor
||Number on the motor
overall: 26 in x 29 1/2 in x 19 1/2 in
Gift of D. H. Lehmer