ANACS returned two Kennedys with "details" #1 1971D MS66 "struck through grease" #2 1971D MS60 "counting wheel damage" Any added value?
If they gave the first one MS66, it's not "details" - ANACS gives 60 as the numeric grade for uncirculated details coins. "Struck through grease" is an error designation. Counting wheel damage is just that, damage. Unless there's something else special about them, such coins are worth face or melt value.
1971-D is a common date up until MS67, but with a grease error, it's likely to bring at least a small premium. It depends on how major the error is. Had this been a 1971 Philadelphia with a significant grease error and a MS66 grade, you might could get over $70 for it. The CPG (now the Red Book Quarterly) is $13.50 for the 71-D and $70 for a Philly. Counting wheel damage is also referred to as "the ring of death", and even with MS60 details, the value is not much. On this one, the plastic is worth more than the coin itself, and you may get a few dollars out of it to someone who wants it for the slab.
I totally disagree. The ring of death refers to damage caused by a crimping machine when it crimps the end of a paper roll usually causing damage to the exposed surface of the coin. That wouldn't grade with such damage. I believe what he is referring to is a Wheel Mark which is a totally different issue. Wheel marks are a concentrated area of hairlines caused by the rubber wheels in coin counting machines. They are most often seen on 20th-century silver. Wheel markings, located on the inside of the wheel, provide coded information about the wheel such as its diameter, width, or offset. That's why we ask to see pictures of the slabs in question It would be interesting to see the wording ANACS used on their label. Keep in mind the TPG's also make mistakes in the attributions.
I recall a post somewhere that said it was also caused by old coin banks like this one. I think there was some sort of plunger inside that held the coins down, and turning it caused damage to the top coin. Don't quote me on that though, maybe we're talking about two different things. The ring of damage on these is small in diameter and at the center of the coin. 1903-S VG Details - Damage
I have not seen one of those coin thingys since meter maids used to use them. I'd forgotten what they even looked like.
You might be thinking of one of these things worn on a belt; I remember them too. Seems like every carnival worker had one. Same kind of thing, maybe with its own unique details grade imparted onto coins.