that color combination and that type of floral design were popular in the 60's.
there was a catalog company called herschner's, i think, that sold the tops, stamped for embroidery. for ll i know, they are still in business. they also sold stamped tablecloths. this could have been intended as either one. you'll know when you measure.
in any event, it's a beauty. it's magic that it survived so well for so long. do you think you could make as much or more by selling raffle tickets for it in your community on your own?
if you decide to sell it on ebay, predetermine a bottom price so you don't get stung.