sentences:  A new mark in the form of Hibernia was introduced on March 25, 1730 to indicate that a duty had been paid on all articles manufactured on or after that date.The Hibernia mark is used on all articles of Irish manufacture hallmarked at the Dublin Assay Office.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.