Sadly, I think I read where 'Surf" passed away earlier this year. I concur that your jug is in the 1800-1850 era. You should do a google search on Crocker Farm Auctions, the largest American stoneware research and auction firm. It is run by the Zipp family, very nice folks who will gladly tell you every thing there is to be known about your piece, as well as potential value. HH