Pictured above is the 1931 Special Delivery 255-A. This was a low volume (less than 1000 built) wood bodied vehicle similar to the Station Wagon 150-B, except that it was an enclosed delivery model.
Unlike the Station Wagon, the Special Delivery had roll-up glass in the front doors, and keyed locking scroll door handles on both RH and LH front doors and a different design keyed locking handle on the rear door sin order that the vehicle could be secured.
Pictured here is the locking scroll handle released by Ford for a driver door application. This handle has a 'flat' mounting bezel (actually shaped for Station Wagon and Special Delivery wood molding). It also had an extra-long shaft which was internally threaded on the end to retain the roadster style inside door handle.
The RH keyed locking scroll handle part number is A-256205, and the LH keyed locking scroll handle part number is A-256206. They are designed for mounting through the wood door. They use the typical Model A roadster and phaeton inside release handles, same as the interior release handle on panel delivery truck rear doors.
The end of the square shaft is threaded for the 10-32 oval head screw used to retain the inside handle to the shaft, and to prevent the removal of the outside handle from a locked vehicle, without first accessing and removing the inside handle.
As far as can be determined from Ford documentation, all other locking scroll door handles are for passenger side doors. They all also have undercut shafts and have curved bezels to fit the body molding shapes for use with the doors and latches of the 68-B Cabriolet and 170-B Deluxe (long shafts), or the 160-A,B,C sedans, 68-C Cabriolet, 190-A Victoria, 400-A Convertible Sedan, and 295-A Town Car Delivery (short shafts).