I have 2 salt glazed ink bottles. They are stamped with the "J.Bourne" bottle stamp. NOT the "J.Bourne & Sons". They do not have any taxing stamp marks on them which I believe dates them between 1818-1849. I believe one of the bottles has the original cork inside of it. I know they are rare but I have been unable to find a value on them. They are both in excellent condition! Can anyone help by pointing me in the right direction to find a value?
P.s...I have done hours of online research & have looked at all the obvious places (ebay, etsy, etc...)