Ancient Pitcher Vase or Jug made from Metal

This pitcher seems very old to me and definately hand made.  It was found in my Grandma's attic in Northern Germany.  Her house is over 400 years old, so I have no idea when this item became our families property.  

It has some rust on the bottom and a few rusty spots on the outside.  A very detailed engraving encircles the pitcher.  

So, can I sell it and retire?  lol..

Thanks for reading.

Cheers 

Poor