Postby dognose » Mon Oct 06, 2014 7:56 am
The engrailed top punch appears to make its appearance in 1809. I suspect that sometime around the 1809-10 year change they experimented with alternative punch shapes and opted for the engrailed version to be used in the long term.
I hadn't thought about it before, but to my knowledge, the Duty mark punch was supplied by London (the other punches were made locally). These must have been supplied with a large edge to them, to enable the Dublin die sinker to create required cartouche shape.
Trev.