Thickness Of Morgan Silver Dollars - Coin Community Forum

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Author	Replies: 4 / Views: 2,903
recollector Valued Member Canada 191 Posts	Posted 10/01/2022 03:37 am getting out the calipers, I realize my Morgan dollar (1886) is thicker than it should be, like 2.9mm instead of 2.4. graded XF. I bought from a reputable dealer. size and weight check out. I realize that the rim is slightly raised. so the calipers measure the thickness of the rim because the jaws are wide and extend over the rim, not just the body of the coin. question: is the 2.4mm standard for the rim or the body of the coin? Report this Post to the Staff

sel_69l Bedrock of the Community Australia 21788 Posts	Posted 10/01/2022 04:18 am After calculating density of 900 silver at 10.25 g/cc, diameter of 38.1 mm, average thickness is 2.29mm It would be reasonable to assume rim thickness is 2.4mm as measured. Report this Post to the Staff
Coinfrog Bedrock of the Community United States 94367 Posts	Posted 10/01/2022 07:58 am Not sure I'm following this - isn't the OP saying the rim thickness is 2.9mm? Report this Post to the Staff
sel_69l Bedrock of the Community Australia 21788 Posts	Posted 10/01/2022 09:27 am If the rim thickness measures 2.9mm, I agree, it is thicker than it should be. If size and weight check out, and the rim thickness is 2.9mm, it follows that the metal must be less dense at 8.1 gms/cc Report this Post to the Staff
kbbpll Pillar of the Community United States 4233 Posts	Posted 10/01/2022 11:18 am Can you post images? My understanding is that some counterfeits make the weight correct by making the coin thicker. Report this Post to the Staff
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