The Owner's Manual shows two key types. One with one flat edge at the top of the key and another with all curved edges. One is used for the door lock and ignition and the other for the glove box. There would have been two identicle keys for the door and ignition.
All these are missing for my '46, which is in the process of being restored. But, if the same as for the '37 the flat edge key is used for the ignition.
