Very curious as to how it came apart and/or how it stayed together until it fell apart. Waiting for the error expert's opinions.
In my opinion.. I would classify it as a Cracked Planchet Error. It either somehow split apart after it was struck. Was still held together and finally separated with a little added force. Or.. When it was struck it split apart and both pieces just luckily ended up together in a sealed Mint bag where they were found.
Based on the (lack of) toning on the now-showing parts, I’m inclined to believe it was a cracked Planchet error that later had help becoming two pieces. I’d be curious to inspect the edges closely to see if there was pressure/bending applied or if it was perhaps reverberations that cracked it. I still think it’s really cool, regardless of how it split.
@TypeCoin971793 has a large cent that broke into 3 pieces. Cool pick up JCro. The tones in the core of the planchet are perty.
Not a lamination error but a defective planchet that was cracked before finally coming apart. A great error and what a lovely addition to your collection.
It was a 'cracked planchet', and now it's a 'broken planchet', imo. Nice coin, and scarce error like that. The Large Cent isn't an error the same, imo.