weirdest coin markings

[Hermes Mambi]

what are the weirdest coin markings you have seen? I am starting to see simple shapes like triangles, squares, etc.

 

[Michael Vegas Pennies]

the most elaborate marking i've found, was a hole punched into kennedy's head (but not punched/drilled completely through) and on the reverse there was the letter "c" stamped into the eagle's chest.

 

[Fropa]

I get lots of halves that the CRHer marks the front of every coin with the month and day he/she checked them (I'm guessing). I get some with initials or name written on them. Then of course all the various lines/dots that are common.

 

[Immy]

I found a half with four holes drilled into it, roughly at 2, 4, 8 & 10 o'clock. Pennyworth sent me a half that had 12 flattened sides and a hole.