X in Siloam Springs
It isn't mine, but I do spend some time in that part of the state, as I go from Tulsa to Fayetteville.
Tell me more about where you saw this X and more about the other car. PM me at mandlebaum at sbc global dot net. I will get you as much information on these cars as I can. Siloam Springs is not a large town, so it will not be hard to find out all about these cars.
Allen Mandlebaum