Well, in all fairness you just asked to identify them and I did :-)
Hang on a second let me take a look online... looks like people are referring to them as vintage, retro, and mid-century modern so those words artificially inflate the price.
I see them running approximately $20-25 a piece to $400 for four chairs and a table.
I see that you are from the Denco unit and there are lots of folks there with vintage trailers. You might see if somebody is interested.