Joe,
Thanks for the pics. Mine looks the most like the low shank in configuration, but the screw mount piece is slanted a bit. And my FW is a 1948. I don't know if that means anything to you. You seem to know the FW's.
I could take a picture, but haven't been successful uploading to this board.
I will give it another go today. My DH was going to look at it last night, but we got tied up babysitting our DGS.
SVAL