Fender Tag Decoding '75 Duster

I am not an expert and you can take this for what it is worth. My understanding is "Hang 10" package was Dart exclusive. On the Duster A63 was an interior decorators package that had vinyl and cloth buckets similar in style to the Hang 10 Dart but not exactly the same because the Hang 10 was exclusively the white and orange color scheme. The A63 duster would look a lot like a Hang 10 Dart it would not actually be a Hang 10 because it lacked the surfer graphic.
All that said I could be completely wrong but that is how I understand it.