Hi Renee the trademark for John Cook is two diamonds side by side with letter J in first diamond and letter C in second - there is a small circle between the diamonds. John Cook worked in New York ca. 1868 - 1880s.
Has your mark the circle? Can you upload a photo of the mark in a follow-up submission?
thanks for writing in... Yvonne Hammouda-Eyre If you would like to join the Antique Jewelry Investor community and stay up to date with all the latest Antique jewelry news, click here....
