Mirror identification

The twin post is the standard drivers mirror . The passenger twin post mirror was a dealer installed option .
The remote drivers mirror on my Dart GT doesn’t appear on my window sticker . I can only assume it was dealer installed and the standard twin post was moved to the passenger side .
This may explain the separate base on the pre ‘67 cars as just by having separate base’s the remote mirror could be installed on A , B and C bodies up through the ‘66 model year .

Did I mention I ordered the car new in October ‘65 and took deliver December 23rd 1965 with the mirrors installed.