My first thoughts were that this was an example of a previously unrecorded retailer mark, but with no evidence of an overstrike and the information from Jacksons, Nathaniel Freeman looks to be the likely candidate as the maker of this spoon.





Photos courtesy of Reg Ency
This example, assayed at Dublin in 1817, is 5.75 inches in length and weighs 18.3 grams
Trev.
.