Vintage FRANZUS Foreign Travel Converter & Adapter Model 18/21. New York USA
2 have two round plug holes with two round plugs and are stamped with 'dia 4.8 USA' on the plug hole end. 1 has 10A / 250 V stamped on it and is two flat pins with two round plug holes. and 'EBENOID LYON FRANCE' on the round hole end.