1968D Kennedy Half planchet defect error?
Olympus620
Posts: 59 ✭
I don't know what could have caused this deformed star and the field surrounding it on the reverse of this 1968D half dollar. Any advice would be appreciated. The star inside the deformed area is still partially visible. This half dollar was saved by my grandmother before 1970 along with 19 other 40% half dollars.
It reminds me of a surface pool of metal created by an acetylene torch but I don't believe that happened so I am asking the experts for an explanation. Can the damage be explained and is it pre or post mint damage?
0
Comments
I'm adding a short video to help with visualizing the defect.
https://www.youtube.com/watch?v=KDtInJ1NwAk
Minor strikethrough.
My Collection of Old Holders
Never a slave to one plastic brand will I ever be.
Strike through
All comments reflect the opinion of the author, even when irrefutably accurate.
agreed strike though
graded coins for sale
https://photos.app.goo.gl/SgQaHavtxqMq1uEM9
@Olympus620 you've started by my count 7 threads where you didn't know what caused the error. At this point it seems like whatever source you're using to get information about the minting process isn't working and maybe you would do well to find a different source of info.
Have you read the resources listed in the first thread pinned to the top of this discussion group?
How about this one. ⇓ It's a '70-D 50C and I thought that it was a lamination issue. The flaw is not as soft w/curves like a typical grease-strike. I'm not sure what it is now.
I don't have different angles & lighting, just this one from the TPG.
What does the group think caused this? It's incuse like the flaw above.
Thanks in advance.
This is an interesting topic.
I own two similar Kennedy half dollars.
The first is graded MS63 and does show extensive strike through debris on the reverse.
The second, graded right after the MS63 shows the same type of strike though yet PCGS stated this one as damaged.
MS63:
Damaged:
peacockcoins
yours and the op are both struck through grease
they were created when the planchet was struck
302 didn't simply follow 303out of the same machine
i see what looks to be some pit-like divots in 303's "area"
for 302 i see a lt of pits and what looks like a small gouge at the H. then there is the one next to the T on the obverse. to straight grade 302, you'll need to satisfy people that all those marks aren't marks but part of the strike through, plus, keep in mind that a coin with strike throughs can later be damaged
That’s a details grade given the wheel dings, right?
These are excellent points. I was so focused on the strike through- believing one was straight graded yet the other was not- I didn't consider PCGS viewed damaged in other areas of the coin.
I do (now) see the concerns pointed out and conclude you are both right.
PCGS didn't grade the damaged coin that way due to the strike-through yet rather as there is damage on other portions of the coin, both obverse and reverse.
peacockcoins
First, sorry about the delay on my response.
There seems to be strong agreement that this is a grease strike through error and I don't disagree however I posted the coin because the many grease strike-throughs on copper and nickel I've found had unrecognizable boundaries and the normally raised or three-dimensional design elements are weaker but the field isn't normally incused like this one. I assume when the die is wiped or cleaned with grease excess is left behind in the incused design elements on the die but this strike through, as well as RC5280's, effects the field and is contained(trapped?) between incused design elements(mine only). Maybe it takes a thicker grease to cause this damage to the field area of a coin or the grease gets trapped between design elements and has nowhere else to go? I assumed on copper cents the grease spread out under pressure but seems stationary in these examples.
Can anyone help me understand how a grease through on Lincoln cents and Jefferson nickles mostly have ill defined edges and this grease strike through has rigid edges? I know I have a few other posts asking for advice on common errors but the devil is in the details as they say. If I don't fully understand an error I don't understand it at all. TIA
Sincerely,
Olympus620
this is pre-wipe and acts as a raised element on the die, thus leaving an indentation on the coin
Thanks for trying to help me out but I was hoping someone would explain why the grease would not continue spreading across the field or into other elements as a very thin layer. I have an issue only a new season of Myth Busters can resolve. I'll drop the discussion on this thread and do some homework.
All grease is not created equal. Some is hardened, and some is mixed with debris (maybe metal dust or other debris from the machine area).
Of course, it could in theory be something other than grease - dried bubble gum, tiny chunk of wood, a miscellaneous piece of someone's lunch. Unless it has a clear pattern or footprint that is identifiable, it often gets classified as grease.
It is technically a struck-through.
That makes sense to me, Thank You. I probably should have spent my beer money on a degree in a fluid engineering or an equivalent degree. Until then I have to rely on experts and persistence.