Col. Ichabod Conk's Bay Rum Pottery Jug

The jug is only marked USA and is real pottery - not painted glass. I've compared it to some of my McCoy mini jugs and it looks very much like some of them. The problem is, I don't know if the jug is old enough to be a McCoy product, so I will just say maker unknown. Measuring from the top of the handle, it is 4 3/4" in height. Judging by the way it is made, it had a stopper of some sort. I don't know if it was cork or fake corn cob. Whatever it was, it is missing. There is no damage, but one manufacturing flaw (see enlargement 3). I need your zip code to calculate the postage.