According to Google:
History and why."The Pentastar logo was placed on the lower passenger-side fender of all Chrysler products, including non-US brands, from 1963 into the 1972 model year. It was placed on the passenger
side fender so it could be viewed by passers-by, a subtle method of getting the symbol ingrained in the public's mind: a nameplate has to be read, but a symbol is quickly recognizable without reading. Thus left-hand drive cars had the Pentastar on the right fender, while right-hand drive cars had it on the left.
"Starting in the 1980's, hood ornaments on Chrysler-brand vehicles used a gem-like version of the Pentastar to signify the brand's upscale status.
"The Pentastar's final badging appearance was on special editions of the 1996-2000 Plymouth Voyager. It was also applied to the steering wheel, keys, and fenders of the Voyager and the other Chrysler NS minivans."
I believe the original ignition keys for my 1969 model also had the logo.