It is always interesting what you will find when searching through a bag of wheaties. My guess is some guy got extremely bored at work...
Well at least you didn't think it was a kind of mint error and asked if it was worth anything. Interesting find.. I have seen others.
but like, what tools, I am dumbfounded, yet intrigued! Well at least I have some ideas of what to do when I am bored now.
I'm glad you provided an explanation. You know the prevailing wisdom of many people questioning PMD - if you can't satisfactorily explain what caused the PMD, it must be a mint error [add sarcasm emoji here]