I have a pair of XP-9s, almost the same as the XP-7 except 3 midrange units and slightly heavier magnets.
Here is the crossover:
Woofer has an inductor in series and no capacitors.
Midrange has a 2.2 ohm resistor in series with a 25 uf capacitor. The line then splits to 2 inductors, one to the common return, the other to the midrange drivers. Those drivers are 2 in series, the combination in parallel with the 3rd driver and a 5 ohm resistor simulating a 4th driver.
Tweeter has a 3.75 ohm resistor in series with a 4 uf capacitor, in series with the tweeter.
Both capacitors are, of course, non polarized. Midrange are connected with polarity reversed.
These speakers were new in 1967 and the instruction manual copyright 1964. There appear to have been multiple versions of these and mine do not have an "A", "B", or "C" suffix after the XP-9.