Hello, I believe I have Chinese antique vase from the Tongzhi dynasty and would like to know if this could be authentic. It appears to have been handpainted and has a red marking on the bottom that matches Internet searches showing Tongzhin 1862-1874, along with a second stamp 06 in a small triangle. I would like to know if this worth selling or possible value due to it being from that era. Thank you in advance.