Signedface of card, bottom center: [Consolidated Vacuum Corporation trademark];
Consolidated Vacuum Corporation / ROCHESTER 3, NEW YORK / A SUBSIDIARY OF CONSOLIDATED ELECTRODYNAMICS | BIELL & HOWELL;
back of card, bottom center: Consolidated Vacuum — designers / and manufacturers of high vacuum / and environmental test equipment
back of card, bottom right: EMELOID CO., HILLSIDE 5, N. J.
FunctionFor reference when working with vacuum pumps or similar equipment. These cards were distributed by Consolidated Vacuum Corporation as promotional material.
ProvenancePrivate Donor, Troy, New York.