Yes, but I think we accept that as 66electrafied stated : an after-the-fact alteration. Everything else lines right up. The lower tier models (Royal & Windsor) didn't have the fender-top marker lights : http://www.lov2xlr8.no/brochures/chrysler/40chr/40chr.html
My mother bought a "leftover" '49 Plymouth new in 1950. It did not have directional signals when she took delivery. It was back at the dealer the next week to have aftermarket signals installed. The dealer did a great job and we never had any directional signal (or really any other trouble) with the car. I passed my driver's license test in it. BTW: In 1960 for the test, the applicant was still required to use hand signals for turns and stopping in Massachusetts.
In the summer of 1983 when I took my drivers test, here in MN we were required to use hand signals for a portion of the test, to insure that we knew them. Instructor would say "use you arm to signal a turn (or stop), at some point during the road test. Not sure if this is still true. JW