GE P-9011 Speaker Issues

[Celt]

If it's actually a field coil speaker, the circuit may need an inductor to replace the coil when replaced with a PM speaker. Might check the DCR of the speaker too. Speaker impedances on those old transistor radios were all over the place back then. I wonder if the existing speaker is actually an output transformer and driver built together? Many of the old transistor radios used OT's.