Thank's just the same LG....Well appreciatedLikely Guy said:It was made between 1842 and 1867. Your shard only shows the day of the month and the batch number unfortunately. You need the top part.
Link: http://www.pottery-english.com/Arti...Patent_Office_Registration_Marks_And_Numbers/
Edit: Oops, I see that Sandcreek was way ahead of me.