Help with ID of Old Sheffield mark

British Silver Reading Silver Hallmarks
1

Hi, I wondered if anyone could ID this mark. I have checked the internet and the best I can tell, it is an 1820-1830 mark. I would appreciate any help with this ID. Thanks. [/img]
Tureen.mark3.jpg

2

Hi Oak-

Nathaniel Smith & Co. c. 1784 Sheffield England
became:
Padley, Parkin & Co. 1849-1855 Sheffield England
became:
Padley, Parkin & Staniforth 1855- c. 1880 Sheffield England

Regards-