Teardrops n Tiny Travel Trailers

Possible restoration or frame up build possiblities The wheels got my attention, any ideas what era or where they are from?

http://detroit.craigslist.org/pts/941671007.html

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I think they ranged from the 1870's thru early 1900's.
http://www.ringling.org/uploadedFiles/E ... ons_LR.pdf
http://www.circushistory.org/Photos/Photo3c.htm
http://blockphotos.smugmug.com/gallery/ ... 5636_jZvjT