What they are...
That is a nice looking pair of J-Modular speakers which have been well taken care of, and seem to have updated crossovers.
The mids ARE FMI 80 bookshelf speakers, with a fantastic sounding 8 inch driver, paper cone and cloth surround, enclosure laying down on their sides, carefully positioned to be time aligned on top of the woofer.
The automotive-looking crossover part certainly IS as reported, a Packard 6 VDC starter solenoid, which measures about 1.75 mHY and can be added in series to get values, as Mr. Fulton did. These air core inductors were called "wroinkers" because that was the sound of a Packard engine starting with the electric starter. The curly part is a low Ohmic value power resistor, we called them "hair curlers".
By now, thirty years later, the ten inch upper woofer driver may possibly be high in distortion, due to having weak surrounds, and the 12 inch slot loaded woofer's voice coil may be hanging down, extended OUT of its gap, due to 40 years of it facing down, firing into the slot. One can carefully remove the 12 inch Alnico RTR driver and reverse-bias the woofer's surrounds with weights around the cone, (have it sit the "other way", with a weighted cone bias applied, for a week) and get the cone partially or fully re-centered in many cases.
There will be a web site dedicated to Robert W. Fulton, on line in the future. We will have the J-Modular Owner's Manual reproduced, with hook ups and enclosure positioning dimensions, and MANY more cool things.
There is no need to actively biamp the speaker, it can be bi or tri amped using its own passive crossovers !! I'd approach the unit carefully and ONLY make conservative restoration choices, easy does it !!
Jeff Medwin in Warrensburg, MO.