http://www.nramuseum.com/the-museum/...-ca-1350.aspx#
I think that this barrel is about 1480-90 years. Looks like barrels from Pilsen and Vienna. Please, look at the mark which is a hammer. I have seen similar mark on the barrels from museums of Vienna (Heeresgeschichtliches museum and Rustkammer). Who was the owner of this mark?