Zinc core disturbance "transferred" through the copper plating?

[VAB2013]

Well Cliff, I can see where this would be difficult to explain and even harder to get pics of! Jim has done a great job with these photos and the 3D imaging! I still don't know what to think tho... I'm puzzled how the coin could take a hit that hard and not show signs on the reverse?

[makecents]

Very cool looking Cliff and fantastic pics Jim!!

[jfines69]

Super images Jim. Lots of detail I couldn't begin to capture.
Any chance you got any images of the third side (edge) of the coin where it wraps around the left edge? The area that looked like it was folded/creased?

I see what you mean about possible contaminant causing the plating to peel away on the right side. Do you think the metal bump remaining in that area on the rim, is a blister?

Thanks again for putting so much time into this one. Cliff

Yes I do have a couple of pics... To me it looks like corrosion under the plating causing the copper to split and raise... If you zoom in there is a little corrosion showing in the split on the side... Also notice all the scrapes and scratches on the edge... No telling what actually caused all the damage but I am suspecting a clogged coin rolling machine???

[jfines69]

To me this was a fun coin to look at and get pics of... Wish I was as good at coin pics as JCuve and Ray... Since the core of these frankenzincs are zinc delaminations of the zinc, I think, would be possible... Only difference between these and the pre 82s is the lack of copper... The laminations on the pre 82s is due most likely to a poor mix and contamination of the metals... We could always have Mike Diamond come have a look... To make sure!!!

[Petespockets55]

.... I'm puzzled how the coin could take a hit that hard and not show signs on the reverse?

Thanks Viv. I was wondering the same thing about damage being evident.

To me this was a fun coin to look at and get pics of... Wish I was as good at coin pics as JCuve and Ray... Since the core of these frankenzincs are zinc delaminations of the zinc, I think, would be possible... Only difference between these and the pre 82s is the lack of copper... The laminations on the pre 82s is due most likely to a poor mix and contamination of the metals... We could always have Mike Diamond come have a look... To make sure!!!

Thanks again for the additional images Jim. That crease on the edge is similar to some improperly mixed copper laminations I've seen.
I guess the raised area on the rim could have been a blister but it also could be loosely packed material (zinc?) that has worked loose like some copper laminations.
Out of curiosity, I think I'll take your suggestion and PM Mike.

[mikediamond]

This could be cracked copper plating or it may reflect an imperfection in the zinc core. I lean toward the former. Sometimes you get cracking and peeling of a composite copper-and-zinc layer.

[Petespockets55]

Man that was quick!
Thanks for taking a look Mike and offering your expertise.
Do you have any links of coins with imperfections in the zinc core that you could share?
Cliff

[jfines69]

Thanks Viv. I was wondering the same thing about damage being evident.


Thanks again for the additional images Jim. That crease on the edge is similar to some improperly mixed copper laminations I've seen.
I guess the raised area on the rim could have been a blister but it also could be loosely packed material (zinc?) that has worked loose like some copper laminations.
Out of curiosity, I think I'll take your suggestion and PM Mike.

I am glad you mentioned the other pics... I totally forgot about them

[jfines69]

Thanks Mike Diamond for chiming in... We appreciate it... Always good to have the pros point us in the correct direction!!!

[VAB2013]

Cliff, sorry I'm late getting back to your thread, and it's great that Mike has chimed in! I thought about this the other day when I saw a cashier crack open a roll of Lincoln's on the edge of the cash drawer. It made me think about your coin and how a hard hit on the edge could cause something that looks like this. Just a thought

[jfines69]

Cliff, sorry I'm late getting back to your thread, and it's great that Mike has chimed in! I thought about this the other day when I saw a cashier crack open a roll of Lincoln's on the edge of the cash drawer. It made me think about your coin and how a hard hit on the edge could cause something that looks like this. Just a thought

That is a good thought... I never considered that!!!

[Petespockets55]

Cliff, sorry I'm late getting back to your thread, and it's great that Mike has chimed in! I thought about this the other day when I saw a cashier crack open a roll of Lincoln's on the edge of the cash drawer. It made me think about your coin and how a hard hit on the edge could cause something that looks like this. Just a thought

Thanks Viv and Jim. They do take out some frustrations with that "technique"!
But I would think that if it did anything, that type of TLC would tend to put a coin out of round so to speak because the counter edge would be parallel to the edge of the coin.

[jfines69]

Thanks Viv and Jim. They do take out some frustrations with that "technique"!
But I would think that if it did anything, that type of TLC would tend to put a coin out of round so to speak because the counter edge would be parallel to the edge of the coin.

Not necessarily... If the roll was hit close to center onto the counter edge the pressure opposite of the contact point would be less allowing the pressure from the hit to dissipate more evenly through out the coin and rest of the roll... Hope that makes sense???

[VAB2013]

Not necessarily... If the roll was hit close to center onto the counter edge the pressure opposite of the contact point would be less allowing the pressure from the hit to dissipate more evenly through out the coin and rest of the roll... Hope that makes sense???

That's kind of what I was thinking too Jim and Cliff. I was thinking mostly about the indentation and how that "could" get there if it was something like that and not an imperfection in the zinc core.