IŽll give the point to Franck, because it is the 1948/49 prototype that was in a public test in Paris during this winter.
It was based upon the Renault Juvaquatre, but I do have the designation
TAXI JUVAQUATRE Type AJD and TAXI 49
It is often mixed up with the 1945 version of a taxi concept with the Escoffier-body as pguillem did, too.