While they definitely look like the US Convertible (Senior), something is different. They look rounder. Maybe it's just that the hoods aren't warped like the US ones often did. What time frame are these from?
Those date from about 73-77 and were exclusive machines to various retailers(The U4002 was the standard model by the time these came out). They were the last domestic models to use the 65/2 style hood but what really makes them different is the fact they are plastic chassis machines!. The U4002 obviously had the unpainted metal chassis albiet hidden by its full hood.