| 1960 RUDOLF GRIESSL Toy Helicopter Patent Print |
| 1960 KAMAN Rotor For A Helicopter Patent Print |
| 1960 BYRON Helicopter Rotor Head Rotor Control |
| 1960 BELL HELICOPTER CORP Rotor Hub Patent Print |
| 1960 BOEING CO Helicopter Towing Art Print |
| 1960 BELL HELICOPTER CORP Hydraulic Control System |
| 1960 SIKORSKY Helicopter Power Transmission System |
| 1960 JENNEY DAVID Helicopter Rotor Patent Print |
| 1960 LUDWIG Control Helicopter Rotors Like Art |
| 1960 STEFAN Toy Helicopter Of Saucer Type Patent |
| 1960 VLACHOS CONSTANTINOS Toy Helicopter Patent |
| 1960 STOECKICHT Helicopter Gearing Patent Print |
| 1960 APOSTOLESCU Automobile Helicopter Patent 19080 |
| 1960 ROOT Jet Driven Helicopter Rotor Patent |
| 1960 KAMAN AIRCRAFT CORP Rotor A Helicopter Art |
| 1960 NAGLER Helicopter With Shrouded Ducted Rotor |
| 1960 JOSEPH Helicopter Blade Control Art Print |
| 1960 THEODORE Helicopter With Jet Driven Rotor |
| 1960 UNITED AIRCRAFT CORP Helicopter Rotor Art |
| 1960 SPRATT Helicopter Towing Apparatus Patent |
| 1960 KONING Helicopter Propulsion System Patent |
| 1960 BENNETT JACK Toy Helicopter Patent Print |
| 1960 STEFAN APOSTOLESCU Helicopter Patent Print |
| 1960'S 3 1/2 in. ND (Japan) tin RESCUE HELICOPTER |
| RUSSIA=1960=HELICOPTER=SC#C98=MNH |
| 1960 San Marino Helicopter Airmail Issue Pristine MNH |