This is a very interesting postcard by the McCoy company of Moncton, New Brunswick (and Boston, Mass.)

It would presumably have been intended to solicit postcard "pen pals" and the "Not Married" would have suggested that the acquaintance could have added potential. I wonder if there was also a "Married" version (and how big a seller those were!)

This is listed as a Series 40 card in Mike Smith's McCoy guide. There are no "Married" versions. McCoy seems to have issued a fair number of flirtatious cards.