| 1950 JEFFREY CO Hydraulic Valve System Art Print |
| 1950 LEE Hydraulic Valve And System Patent Print |
| 1950 RIKE Truck Tank Emergency Valve Patent |
| 1950 PETRY Gas Release Valve Insecticide Patent 24753 |
| 1950 ANDREWS ALDERFER PROC Oral Inflation Valve |
| 1950 GOLDMAN Air Control Valve Patent Print Art |
| 1950 ALDERFER Oral Inflation Valve Patent Print |
| 1950 GOLDMAN JOSHUA Air Control Valve Patent |
| 1950 MAJNERI LUDWIG Hydraulic Valve Patent Print |
| 1950 NANCE Salvage Valve Patent Print Art |
| 1950 NANCE CLARENCE Salvage Valve Patent Print |
| 1950 ARTHUR ROBERT Flow Control Valve Patent |
| 1950 WARNER AIRCRAFT CORP Hydraulic Valve Patent |
| 1950 O'BRIEN Plural Valve Plumbing Fixture Art |
| 1950 GARRETT CORP AIRES Flow Control Valve Art |
| THORN FERGUSON 352U 1950'S BAKELITE VALVE RADIO WORKING |
| VINTAGE 1950.s "AWA RADIOLA " TUBE / VALVE RADIO-Rare! |
| M-1950 STOVE CHECK VALVE PACKIN and FILLER CAP PACKING |
| M-1950 GI.STOVE PUMP CUP(3) & CHECK VALVE PACKING ( 5 ) |
| Great 1950's American Philco Green Plastic Valve Radio |