As previously mentioned, the Dodge, Plymouth Chrysler and Chryco, all 4 will have different part numbers. Your best bet is to go with the Chrysler face , probably 75-80 % of your a12 cars
had this one originally. But you COULD have had
a Dodge face in the Superbee, or a Plymouth face
in the Road Runner. Either radio is 100 % correct for your application, just depended on vendor supply at the plant on that particular day .
As far as the Chryco (which also has 68-9 Dodge dart style chrome preset buttons) who knows what's
going on with that ? It could have been for cars
actually built in Canada at R code plant(not A12s of course) an over the counter dealer radio
or whatever. All I know is Chryco was Canada's
Chrysler division. I certainly would not think an A12 car , built as a Y07 Canadian spec car, would have left Lynch Rd with a Chryco radio.
My thoughs is that it was installed sometime latter.
Just guessing.

Greg

Wards Classic Car Radio Repair Specializing in restoration and sales of Mopar A B E body radios
http://www.wardsclassiccarradiorepair.com/
gregward@mchsi.com