www.925-1000.com

Here is the picture of the whole piece from earlier post. Not sure why it took it upside down! This thing is massive, weighing in at nearly 60 try ounces. The underside is all hand hammered looking and there is what seems to be little dimpled marks around the dished part like an outline of the overall pattern size was put there. This piece is awesome.

Hi,
This mark was used in Portugal for old silver.
Shield with letter P looks like Porto (late 18th early 19th century).
Regards

Belongs to Luís António Teixeira Coelho, from the third quarter of the 18th century

Pertenece a Luís António Teixeira Coelho, del tercer cuarto del XVIII

Saludos

Another example ; solved !
First two decades of 19th century cannot be excluded.
Regards

Great replys, clears a lot up about this piece. Thanks very much to all responders so far.