Perhaps first revisit this topic by Boatshed back in 2019, as it is directly related to this topic.
http://goccf.com/t/349394I have been looking at 1922 pennies for a wide spacing date, after a topic by Mr T about date spacings and alignments. While going through my spare parts box, I noticed the first die clash under the chin of the king. I thought it was
PMD at first, but then decided it was a mint issue. Looks to be a part of one of the N's on the reverse.
So I continued looking for a wide spacing date, and came across another of the same die clash.
So on it went ( I have 37 spare 1922's) until I ended with 5 1922 pennies with varying degrees of this die clash.
The 4th find was one a bit different to the others, more like a triangle cut into the same position, and also a strike through adjacent to the nose. This is a twin of Boatshed's 1922 penny. (minus the hole)
Interesting (to me anyway ) that I also found the parallel trough die clash on a 1919 penny.
I don't know if 5 die clash coins from a field of 37 is indicative of the propensity of this error out in circulation back in the day. A quick google search only came up with the CCF thread above.
That bit of tungsten filament....or whatever it was that was struck through on the last coin shown here, must have hung around for a bit, and what are the chances of the two twin coins ending up on this forum.
Maybe there are many examples of it floating around unnoticed.
Anyway, I found it interesting and thought it worth as share.
Cheers tt
Coin 1 1922 Penny - faint die clash parallel trough

Coin 2 1922 Penny - die clash parallel trough

Coin 3 1922 Penny - die clash parallel trough

Coin 4 1922 Penny - die clash parallel trough with impression angled to the left

Coin 5 1922 Penny - Boatshed's coin from 2019

Coin 6 1922 Penny with die clash and strike through adj. to nose

Close ups of clash and strike through

The Ox moves slowly, but the Earth is patient.