Postby silvermakersmarks » Sun Apr 01, 2018 1:47 pm
From observation of Dublin marks the cut corner rectangle was actually in use from 1794 and the duty mark was introduced during the 1807/08 assay year, giving a slightly wider window. However T&W's working dates were, according to Bennett, the authority on Dublin silver, 1802-1824, so we can assume a date range of 1802-1807.
Phil