Nothing new here...on foreign DeSotos the Diplomat package was available. And before 58 too. Just like the "Plodges" of Canada, the Diplomat was a blend of DeSoto and Plymouth touches or a "DePlymo", if you will.
I don't think Diplomats were sold in Canada, since we went the Plodge route.
Can't make posts like that without getting hounded for pictures.I have one 1958 Desoto Diplomat Deluxe 4D Sedan.