Luckoftheirish got some bicentennial quarters

sinin1

not sure the story on these - but one is 'No S' ?





I lost some resolution dropping it from a 2.2 mB . BMP file to a 46 kB .JPG file

wingedliberty

Very nice, Are you trying to say that he has the luck of the Irish.

sinin1

I am not trying to say anything


I think LUCKOFTHEIRISH believes the slabbed coin is silver therefore missing the "S" mintmark or wrong planchet from Philadelphia


If the silver quarter is supposed to weigh 5.75 grams and the copper-nickel 5.67 grams - you probably could not be sure -> would you have to run test to find out metal composition to be sure?

nwcs

Doesn't look silver. Here's an easy test. Get the same type of holder with a clad quarter and the same type of holder with a silver quarter and weigh them on a scale with 1/100 minimum gram accuracy. Then weigh this one and see which one it is closest to. Mint tolerances being what they are, it should be very close to one or the other.

itsnotjustme

But what are PCGS tolerances?

JohnZ

But what are PCGS tolerances?

LUCKOFTHEIRISH

Dave,
Thanks for the help.

Libertad

One of my favorites, Luckoftheirish, Gradh Mo Chroide!

sinin1

Does anyone know what the mint specifications and tolerences were for quarters 25 years ago?



The silver planchet was supposed to be 5.75 grams +/- what? .005, .02, .05 ?

I am not sure weight by itself can be an indicator of composition - anyone know?

MFH

Luckoftheirish:
From the scan of the PCGS coin, its a clad Philadelphia, not a 40% silver no S coin.

Glad you posted it. I was wondering what you actually had.

Nice group of off center bicentennials !!!!!!!!

DeutscherGeist

Weight itself does not tell you the composition, but its a start. Objects of the same size, but different weights actually do have different compositions....