Lancaster Antiques has dated this piece to the 1920s.

The teapot measures approx 5" (12cm) in height and the tray at the maximum point is approx 16" (41cm)
Carl Deffner Esslingen was born in 1856 and took over his father's metalware factory in 1900. Many good quality pieces of Art Nouveau and Art Deco came from there.
Each item is stamped with their trademark.
Lancaster Antiques has dated this piece to the 1920s.
You can view the stock and full dealer information on the Lancaster Antiques Profile Page