Looking to get help pricing a Cauldon platter. It has the stamp on the back that says “Cauldon Place England Rd No 184291

We know John Ridgway made porcelain at Cauldon Place, Hanley, until 1855. The firm of John Ridgway, Bates and Co. of Cauldon Place worked from 1856 to 1859.

So it dates between early to mid 1800’s. Any help would be appreciated.