Well How bout this one 1994 D

[Merlin8971]

Here is a 1994 D I found this evening.

[tellurianpearl]

perhaps trapped gas?

[JR Emery]

Thank-you for sharing an interesting cent.
I am not able to see clearly due to the zoom is slightly out of focus and there seems to be some forigen substance around the mintmark.
I would like to see this either with a 16x mag or a 30x steroscope.
Did you check the CONECA files on Varitey Vista site?

[Merlin8971]

In hand, it appears to be a D mintmark rotated 225 degrees. There is no foreign substance.

I did check Vista but it appears the RPM's only go to 1989. Maybe I did not look properly.

Oh, what would be a good microscope for viewing coins and taking pictures. I have been looking at scopes up to 2000X with triple viewers as in binocular plus camera scope. I think they are called trinocular scopes. But the vendor suggests a 30x to 50x steroscope. Personally, I already go to 45X handheld but that does not seem to be enough. I am looking for something that balances focus/brightness and sharpness which I seem to have trouble getting with the equipment I have.

[jcuve]

Your coin had splits in the plating which have been exposed to the elements and corroded causing the zinc to oxidize and bubble the plating. In other words PSD (post strike damage).

RPMs stop in 1989 as MMs were no longer punched into the dies beginning in 1990; MMs were added directly to the designs. There are a few instances of a doubled die occurring on the Denver mintmark after 1989 - there are not many known, none are dramatic (even on 1995-D DDO-003) and the coin pictured is not one of them.

Thanks for sharing.

[rascal]

Your coin had splits in the plating which have been exposed to the elements and corroded causing the zinc to oxidize and bubble the plating. In other words PSD (post strike damage).

RPMs stop in 1989 as MMs were no longer punched into the dies beginning in 1990; MMs were added directly to the designs. There are a few instances of a doubled die occurring on the Denver mintmark after 1989 - there are not many known, none are dramatic (even on 1995-D DDO-003) and the coin pictured is not one of them.

Thanks for sharing.

Jason you got it right on this person's coin. I hate these modern cents with the zinc body and the super thin copper plating. soon as the copper plating receives a tiny crack or scratch it no longer protects the zinc coin. then the zinc starts to rot immediately when exposed to the elements then the entire coin will become all chalky like and fall apart then our cent is just history.

these rotted and bubbled up blister coins are for sale regulary as error coins by folks that don't know any better.