[MrFixr55]

Hi Cdoyl, Yes, that pic clears it all up, and Ron confirms it The reason that you have only 1 wire for the voice coil is because the other lead of the voice coil connects to the "hum bucking coil" of the Field. the other end of the hum bucking coil conects to the speaker frame which is screwed solidly to the radio chassis at 4 different points. One lead of the output transformer secondary is likely connected to chassis ground in a similar manner.

Getting another speaker from a Parts Set is the cleanest way to go, but by using the existing speaker for its field, connecting the one existing voice coil lead to the voice coil and connecting the other voice coil lead to chassis ground using an existing screw and a ring terminal will allow you to enjoy the radio now until an exact replacement is found.

Another way to go is to mount the original speaker in its place. Note that there is terminal for an external speaker on the chassis rear. It is only one screw, marked "3" The other 2 screws are for the antenna. A chassis screw is the other connection. Philco did this on several models, including the 41-255, 42PT94 and 47-203 in my collection. Not sure why they did this because this will mismatch impedance, but i also allows a bigger speaker.