1922 Penny multiple rim flats

[autocoupler]

I know this is pushing the boundaries, no pun intended :dodgy: and could just be the result of some back shed tinkering, but does anyone have other opinions of how this rim flattening could have occurred. May be misadventure in a vending machine etc. or even a mint process gone wrong. Are there any known minting process faults that would create this effect.

The coin looks just like any other old 1922 penny but in fact is a variety not well known and rarely correctly described. It's an upright 9 common width dated penny, is extremely scarce and never found by me in high grade. They are often wrongly described as the wide date variety simply because of the upright 9. Nearly all common date width pennies display the obvious LEFT leaning 9.

When I find these coins, which is rarely, they all appear to have clean and well centred rims, particularly on the obverse. In 8 years of constant searching, mostly every day on internet,  attending shows and dealers I have only sighted 9 examples. So considering this apparent scarcity, when I see one with these flats, and have another displaying a hint of the same effect, certain questions arise like was there indeed a mint process issue concerning defective machinery or dies that may have required the cessation of a mint run.