I think that Brad is correct. There was no factory chromed window trim on 47-55 trucks' door windows.
In some years there was stainless steel interior trim (maybe the 47-50 mentioned above). This stainless interior window trim (garnish molding?) can be adapted to work with later vent-window doors.
In most years there was exterior window garnish molding trim (except for 52-53, I think).
In 1954/55, I do not think that there was stainless inside window garnish molding but there was stainless exterior window garnish molding that came with one or more of the deluxe options.
