A new mark in the form of Hibernia was introduced on 25 March 1730 to indicate that a duty had been paid on all articles manufactured on or after that date.

Up until 1923, the Dublin Assay Office was subjected to the same laws governing silver production in England and Scotland, and thus marked its wares in a similar manner.

The formation of the Irish Free State in 1922 meant that the laws were made and governed from Dublin, but the system of hallmarking has largely stayed the same.

[2] The Guild of Goldsmiths (of All Saints) was known to have existed prior to 1557 when a replacement of its medieval charter was sought.

[4] After the Custom House burned down in 1921, the Goldsmiths – and the Assay Office – moved to Dublin Castle in 1925 from where they continue to exercise scrutiny and control over gold and silver ware throughout Ireland, subject to various acts of Parliament over the years, often relating to duties imposed.