I can't comment on the process or how it would work on coins, but the Fraunhofer Institute is a top notch research facility in Germany, so their...
You're right about using uncut sheets to make "cutting Error", but anything with a number starting at 96 through 99 would also be from an uncut...
You're right. It's PMD
A quick way to tell if you have a reproduction is to check the serial numbers and signatures. These should be handwritten in ink. If they are...
Not an error
What I was trying to explain above [IMG] [IMG]
The only way I think it could happen is if it's struck on the scrap part of the sheet, in which case would result in 4 very large clips
It looks like somebody was messing with it on a grinder. I do not believe it's a quad clip for the following reasons * The edges of the rim next...
The blanks went into a furnace to be annealed, not dried. Annealing is step that increases ductility of the metal Nearly all materials expand...
I would caution against using these types of solvents unless you have chemical laboratory experience. Some of this stuff can be really nasty if...
A die crack would show up as a raised area on the coin
I am a big fan of reference books. Over the last 30 years I have about 200 diff volumes (sucks when you have to move). Everything from Ancient...
Like @paddyman98 said. It's solder
Guess it's time for a new book
I would strongly suggest that you make sure "the coin professional" fully understands how to do a compositional analysis. There is a lot more to...
Doesn't look unusual. Copper is a very reactive metal
FYI. The side with the name of the merchant is considered the Obverse for CWT Storecards. The side with the Indian head and date is considered...
Looked it up in Fuld as a NY-630M-13, but he lists a diff reverse, not the Indian head in your pic. Bowers also lists the same single reverse as...
@desertgem and @Michael K have given you the answer. For it to be gold, it would have to weigh significantly more than a normal cent, or be much...
Common date Mercs that are truly uncirculated should carry a modest premium over melt. Nice AU pieces should get a small premium over melt, but...
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