There is no problem with my first stamp as it tells me what it is.
This stamp was issued in 1966 to publicise the largely undivided highway following the Mississippi River from New Orleans to Ontario, Canada.
My second stamp is the one I know nothing about. I don't remember when I acquired it but it has obvious been soaked off an envelope. It has no distinguishing features that I can see which allow me to identify where it is from.
I don't even know whether I have presented this the right way up.
I hope you will be able to help me identify which country issued it.
Meanwhile for less mysterious stamps please pop over to Viridian's sunday-stamps-78
I've just realised that this is my 400th post so help me celebrate by solving my query.