This is a commemorative show/convention cover. There is, unfortunately, no comprehensive catalog for this type of material.
It does have a nice ArtCraft cachet (I've always loved their black and white artwork); unfortunately, there is usually no additional premium associated with ArtCraft cachets.
Stamp is a bit crooked and there appears to be a smudge on the cover at the right -- estimated RETAIL at typically 25c-$1, depending on whether you can find the "right" buyer. Keep in mind, I don't actively collect covers, so take that estimate with a grain of salt.
Thanks for posting the pic -- don't see too many inaugural convention covers.

k