Rib is just marked Liverpool vs any specific street, Checked the proof marks against the pictures available on the interwebs and it appears to have been Birmingham proofed between 1896 and 1925. Further interwebbing informed me that Williams and Powell moved from Liverpool and ceased to be W and P in 1905, selling to W, Richards. So I'm guessing Year of manufacture was between 1892 and 1905. have alos emailed W Richards to see if they have information. Thank you for your assistance.