I would agree with Flump. Thomas Ollivant registered his mark in 1789 and J.W. Botsford joined him in 1855. The only date letter k in that style earlier than 1925 is 1865. If it’s as early as that, lock it up somewhere😁!
If you take a screen shot of the pic you have posted here ( I just did) then use google images there are a lot of images very similar/ the same as yours.
Thank you that is helpful. So that gets me I think to the makers and in the period 1900 to 1925 now I don’t know what the final mark is the one that looks like an h with a mark above it.
Good morning I have an old family teapot which has this hallmark on it. I wondered if anyone here knows about hallmarks. Frankly, I haven’t a clue. However, the first Mark I think is of Ollivant and Botsford as that name is imprinted at the base of the pot. I would be very grateful for any help on this. Thank you.