When I saw this in the bin I immediately knew it was something very special. At first I thought it may have been Tiffany, but then I saw the Japanese Chop.
After some research I found it was made by Gyokusendo Copperware. The company has been in business in Japan since 1816 making hand hammered copper objects. A new teapot today could run $720+ USD.
I was thrilled to purchase it for $4.99.