Is this the result of a coin machine mishap?

Crackout

I see these coins in change quite frequently where areas af the coin have been completely rubbed away by counting machines, etc. But this one caught my eye because it is a 2004-D, and secondly, because the damage is on both sides. Then I notice the rims seem to be fairly intact and that the "rub" is not very consistant. It seems to have been rubbed out certain letters and not others (look how the "I" in LIBERTY is all but gone, but the "L" is untouched).

Maybe it is a combination of weak strike and a frightening night caught in a counting machine!

BigDipper

you can do that witha dremel

coppercoins

This is a case of an obstructed die strike, probably through grease and dirt. This one has enough of the area of the coin affected to be worth a decent premium, maybe $5 or so. It is a very nice example. Good find!

cladking

Looks like a grease strike to me. Planchets and dies often have a little oil on them
to facilitate handling and strike. This oil can become excessive or accumulate in the
dies and obscure details.

Look at the letters of LIBERTY. You can see a little weak luster on the tops. The copper
coating on these is extremely thin and a little machining or rub would expose the zinc.

Crackout

Thanks for the info coppercoins!

Edit: And cladking!