Based on the number of 57 photos that have come across the web showing cars with regular windows and what the other posters above said, PWs appear to have been a fairly rare option in the 57 Clipper -- and Studebakers too for that matter. S-P was unable to supply the original Packard window motor in the late 50s and came up with a replacement which is also no longer available. I kind of suspect that might be true for a complete Studebaker window setup too.
Because of several failures and high cost and limited parts availability to repair his Packard setup one poster elected to adapt
a modern universal street rod window setup to his 55. Perhaps one of those kits would be an option for your 57.
It takes a couple of extra relays to adapt the modern motors in the kit to the original switches but is easy enough to do. Craig did it one way and I have done it another way using inexpensive cube relays. I don't know if 57 kept the same style switch as 55-6 Packard. If so used 55-6 4 position drivers door and single door switches are available. They can be problematic with high current of the original motors but more than sufficient with relays. If you used those switches no one would know what was inside the door. Some of the mid 50s GM style switches are available too.
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=181701