19th Century early to mid 1800's,  this handmade dovetailed and hammered solid copper tea kettle has brass braised dovetail joints.  
There is a flap over the gooseneck spout and the shapely lid has brass finial. It has a "Strap" handle with the number 13 stamped into it which is how the French numbered their pots. I am assuming this is
an FRENCH piece because of the stamped number although it has a lot of similarities with Danish tea kettles.  It has a pleasing patina and dents to show its age.  The inside is lined and in good condition.
It holds an amazing 20 Cups. 
Weighs: 3 lbs 14 oz.
Height: 12 in (handle up) 9 in (handle down)
Width: 12 in
Bottom diameter: 7 in
Circumference: 29 in