I have a new teapot that i bought in an op shop in a small town. Its not the type i normally buy but it was just so different to my others and a good price i had to take it home. It has hallmarks on the bottom saying I.Tyler over Sheffield then the numbers 1504 over 6. All i have been able to fine is that it was made by John Tyler between 1836-1869 i think. I couldn't find much info. Would just like to know more about the maker and the value not that i would ever sell it. Thank you for your time.