Question About Thinly Rolled Plankets Specifically Nickels

Well the design elements are all normal, even the bridge around the outside of the coin is it normal thickness and all areas and there are no areas jutting out around the external edge of the coins, there is no indication that this coin is any different and I currently don't have a scale to test my theory. I'll work on getting a picture of it but so far I've just had no luck, although the specific coins I am talking about had the thinning near the neck, these are the only ones I pulled out. I found coins starting in the 1970s all the way up to 2004 that had a thinner section and it doesn't seem to be isolated to the neck area, other common areas I found it at are near the word Liberty and towards Jefferson's head, it almost looks like a machine they set up in the 70s and used up until recent years for the thinning of the metal before punching the planchets, it almost looks like the mint could have very easily had multiple thinned areas before punching which would explain why the thinning areas don't always line up especially for the same date and especially for all the coins of different dates that have thinning in the same area, maybe I can take pictures of the coins when I have a legitimate measuring tool or better camera. But it seems to be more apparent on the coins from 2000 and 2003 but I have found it on a coin from 1970 with the same area.

Sounds much like a polishing affect. Like a portion of the neck "disappears"? Areas you are describing are called "fields", the flat areas on a coin. Remember to think in reverse when talking dies//coins. The field of the coin IS the flat upper surface of the die, the devices are infused into the die so images can be transferred. The field area on the dies get affected by all kinds of problems, clashes, debris, feeder finger and ejector scratches, small chunks of crap that become imbedded through repetitive poundings. These are removed from the die face through polishing with a diamond paste/solutions and if necessary wire brushes. At times if the blemish is deep, a hard buffing will take off more surface on different points of the dies. This can also cause the "grease-filled" strikes, that compound isn't completely wiped off, gets into the "holes" (devices/details) causing loss of definition in specific areas. This fill is quite hard and compacted, hard as if not harder than the metal allowed of the die itself. At times these fills will "fall out" of the device causing a "struckthru debris" effect on future coins.

Strikethrus are "collateral damages"!



Jut normal machining problems of the process. Like that "floating roof" on the back of 69D/70D Lincoln cents, or the "no FG" on Kennedy's. Polishing does these, now some, may have value like the no FG, IF, and only IF the mint itself polished the initials ALL THE WAY GONE! These can be faker coins, if ANY residual is there, it ain't the error. Greasers generally don't hold any premium values, some just can really look neat!

Now, on your pix, laterally side to side? Wedge shaped? That's normal. When coins are stamped, there's a period after the downward strike where high hydraulic pressure is applied. Because there are alignments, some flexiblites are built in. Things may shift a bit naturally(stress reduction) so breakage doesn't occur,or could just be loose. Think of it like walking, how you shift weight along points of our foot.

Reeds253, some people may need an answer instead of outright egotistical criticism. So you've "done it for 40 years", so have a lot of us. How may I inquire did you "divine" your info rewarding OPs mag factor?

I don't own any magnification tools yet and at the moment I only have a ruler,I'll look into those specifications when I am buying gear. I was thinking of getting an automotive style spacer or something along the lines of that in order to tell acute variations. Its cool to know how it can occur .I did post for knowledge and all critiques is new info to add to the bank,thanks everyone for your input.