Also, the Super convertible had Power Windows, top and seats. And Dynaflow was an option. It does not look like Power Windows and seats were an option, but rather provided on some of the Super and Roadmaster models. In particular, the Super Convertible, and the Roadmaser Riviera's (2 and 4 doors) and the Convertible.
Gary
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BCA #40969
'50 Special - "Yoda"
'64 Electra Coupe - "Arthur"
'48 De Soto S11 Coupe - "Bobo"