That leaves these 22 makes to check:

Buick
Chevrolet
Chrysler
De Soto
DKW
Dodge
Douglas
Ford
Henderson
Kaiser
Lincoln
Meteor
Oldsmobile
Packard
Pierce-Arrow
Plymouth
Pontiac
Rambler
SAAB
Studebaker
Terraplane
Volkswagen

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For the solitaire DKW I can tell that it is 'Junior de Luxe'.

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I found one brochure picture for the SAAB V4 saying 'DE LUXE':

That doesn't tell if it is 'De Luxe' or 'de Luxe', but most people use the first version.