1920’s Antique Grebe RORK 2-Stage Radio Amplifier

Own a piece of Radio History! This is a museum quality collectible. Grebe type RORK 2-stage radio amplifier. Markings: (engraved on panel) Grebe Radio - Trade Mark / Richmond Hill, N.Y. / Type RORK / Serial No. 298. Manufactured Under / Grebe Patents / Current & Pending. A two-stage audio amplifier using A type tubes and having monitoring jacks on the front panel for detector, and first and second audio stages. Filament rheostat for each tube. Measurements: overall: 7 in x 8 in x 6 7/8 in References: Smithsonian / National Miseum of American History & Clark Collection CWC -A. Grebe catalog, 1922.