1955-1957 Plymouth 2 or 4 Door Sedan? NOS C-38 Vent Shade

These NOS C-38 Vent Shades are unknown.  Based on the stamping on the vent shade it appears to be a 1955-1957 Plymouth sedan.  The length of the rear vent shades seem to be for a 4 door but this too is not for certain.  The length of each vent shade is included in the photos so you can know what you're getting.  The shades are in good condition with some minor shelf life and scuff marks.