The print and mark belong to Job Ridgway & Sons c.1813-14. See: https://ridgwaypatternbook.org.uk/cauldon/cantonoc.html#rc01016
If you scroll up the page you will see all the shape so far found with the print and the three backstamps associated with it. For proof of the Ridgway attribution I suggest that you compare the items with the print to marked Ridgway items in the same shapes on the individual shape pages as follows:
https://ridgwaypatternbook.org.uk/cauldon/earlydinner.html
https://ridgwaypatternbook.org.uk/cauldon/octtable.html
https://ridgwaypatternbook.org.uk/cauldon/earlydesspearl.html
https://ridgwaypatternbook.org.uk/cauldon/loop.html
If you would like to take this matter further my email address is office@ridgwaypatternbook.org.uk