2021 Australian 5 Cent Coin Unc Struck Through Echidna Spikes

If yous can't see photos I can retry from another angle

Do you mean die clash?

It does look like the spikes above the 5 are poorly struck though.

Still have 10 rolls of uncirculated 5 cents to noodle through

"Strike through" is not the correct term. A "strike through" is when a foreign object (like a screw, or a piece of wire, or a piece of string or cloth) falls in between the coin and the die, so the impression of the object lands on the coin.The term for what you think you might have is a "die clash". So an "echidna spike strike through" would be if an actual spike from a real-life echidna managed to fall into the coin press and get squeezed into a coin.And while there are echidnas in the wild around Canberra, you're not likely to have one wander into the coinage press area.

And this isn't a die clash either; die clashes almost always happen on the high points of the die, which are the lowest points on the coin - the background field, rather than on the devices like the queen's portrait.

I thinkit's just a bag mark - dints and scratches from rattling around in the big drums and bags of finished coins before they were rolled. These coins are not rolled at the mint, they get shipped in bulk to the armoured car delivery companies, who roll them up. They might, or might not, all be actual mint-fresh coins; the companies are under no obligation to provide "uncirculated rolls" or making sure all their coins are single-source.