On identifying the hallmark on my teapot

Hello.
I would like to know where my lovely egg-shaped pot came from, so please share your wisdom.
The mark at the far end can be read as EP by the naked eye, so I am pretty sure it is electroplated.

Now the question is the company and date this pot was made. I can’t find the same mark for “W.B&Co” on the internet, and it looks slightly different from William Briggs & Co, too.

I would like to make a pot of tea in this pot after I find out where it came from and can polish it up nicely.
Can I wash it with baking soda and aluminium? And if A1 stands for top quality, does this “S” mean disappointing quality?

Thank you in advance for your help.


I would say definitely William Briggs & Co of Sheffield. There is an example of your mark attributed to this company here.

Phil

Thank you for taking the time in your busy schedule to get back to me!

I see, it is indeed William Briggs & Co. I’m sorry I couldn’t find it on my own.

So this pot came into existence somewhere between 1900-1923. It’s been around for 99 years at the very shortest! I’m a bit pleased.