Here's what seems to happen with a die clash. The obv die has the large central bust
, and the rev die has some more varied design. You can see that the result of striking a coin after the die clash is that the reverse
die will impart on the flan
not only the raised reverse
design, but also a sunken (incuse
design. It's not all all intuitive until you see the diagram (I just came up with this the other day trying to figure it out for myself).
You can see from this drawing that with a die clash the portion of the raised design over the incuse area
may actually appear enhanced (i.e. unaffected) relative to the rest of the coin, whereas for a restruck brockage
I think the opposite would occur - the incuse area
of the flan
would be less likely to fully meet the die on the second strike, and the raised design in that area
is likely to be weak.
It also seems that it's the bust
that will show up most clearly on a die clash since it's a large mostly/wholly incuse area
on the die, surrounded by the higher mostly uncut legend area
which will therefore hit the other die first leaving an imprint of the bust
. With a more varied design such as a typical reverse
design, there's not typically going to be such a large differerence in the distribution of contact areas when the dies meet, and therefore less of an imprint/effect (the force is more evenly distributed).