This image shows a manufacturer's mark for a collectible antique ceramic piece. 

• Manufacturer: Thomas Till & Son, a British pottery firm.

• Pattern: "Grecian".

• Era: 19th Century; specifically, this mark with "& Son" was used before 1861, after which it changed to "& Sons".

• Type: The mark is typically found on dinnerware items such as tureens, plates, or underplates.