Posted 4 years ago
M2limited
(1 item)
Can anyone provide insight into why several of the Pennsylvania minted 1/2 dollers from the 2009 uncirculated 36pc mint set mesure .15mm less in thickness and have a weight differance of just under 1/10 gram? Many of the Pen. 1/2 dollars also appear to have been struck with noticeably less pressure leading to a flatter appearance that I found nearly impossible to photograph. The thickness differance is visualy notable in the photos I provided. photos can be deceiving as can our eyes which is why I have included the micrometer shots. The stated thickness I have found to be standard, gleaned from several numismatic sites, for this coin is 2.15mm and to the best of my knowledge/reasearch ablility there have been no published changes to the coins dementions since 1970.
These 2 coins came from the same 36 coin set. I have found 10 such sets all of which the denver coin unwaveringly measures at 2.15mm thick. Inexplicably, the PA coins vary from 1.98-2.04mm.
Thoughts?
Best Regards,
Matt
As an odd addition to this post, please take a look at my profile , picture as it shows the dollar coins that came with the sets. Notice the weaker Pennsylvania strike vs. The almost over striking seen from Denver's?