This type of 19th century tea kettle was called a spirit kettle. They hung from a stand and were heated over an open flame created by lighting the alcohol (or spirit) burner in the base of the stand. None of the pieces have any markings, but the distinctive coiled finial on the lid and openwork brass stand arms indicate probably Scandinavian origin.
The solid copper tea pot is wide and low with a partially covered, angled straight spout and hinged handle. Brass pegs at the sides allow the user to mount the kettle in place on the stand. Height is 3 inches to the rim seam, about 7-1/2 inches to the top of the handle. The pot is 9" diameter across the shoulder, not including the pegs or spout. The stand is copper with brass arms. It's a little over 8 inches diameter at the base by 8-3/4" high. The spirit burner has its wick and the original copper cap.
There are a couple of small dings on the side of the kettle opposite the spout. They are old and patinated, hard to see. There is some verdigris near the rivets and hardware joints. The coloring is a warm brown with a hint of red. I had to lighten the photos some to better show the details, resulting in a spotty appearance to the patina which is not nearly as prominent in normal lighting conditions.
Antique Copper Spirit Tea Kettle With Stand