David Pickett Antiques has dated this piece to the 18th Century.
The piece is unmarked and has a visible internal seam.

The condition is very good overall with no major knocks or dents. Slight copper copper bleed to the raised edges and to the crests as to be expected. Slight surface wear due to age and use.
A very large and impressive piece of Old Sheffield Plate with an interesting history.
Weight approx 890g
Height approx 23cm
Span approx 22.5cm
Diameter at rim approx 11.5cm.
David Pickett Antiques has dated this piece to the 18th Century.
Specialists in old sheffield plate
You can view the stock and full dealer information on the David Pickett Antiques Profile Page