Keith, Looks like you've got a rare one there. I'd never seen an Apollo that looked like yours, but finally found one here;
http://www.adsinusa.com/c/3851/3851n3959.htm Some indicate that less than 50 were made. Seems they were well made and people tend to keep them. Same thing for that Airstream/Argosy.
A word of advice to you and Martin. Check the dates on those tires. General consensus is to replace after 7 years - not based on wear. A blowout on the highway isn't fun (I've had 2 - each time it was one of the duals, so I could keep going for a while). Good Sam or CoachNet are good roadside services to have.
BTW We are not alone... http://advrider.com/forums/showthread.php?t=466525&highlight=nwgs 
