Need Help With Morgan Dollars

The Comstock lode was in Nevada, thus a coin minted in Carson City (CC mint mark) is more likely to have been minted from such silver.

It is not possible to tell if a coin minted in Philadelphia ( no mint mark) was made from silver from the Comstock lode, but I would consider it unlikely (but I am no expert on the subject).

The Morgan dies started with a hand drawing then a wax model was made, and from the wax model a plaster mold was formed. From the plaster mold a copper and nickel plate backed with lead called a Galvano Plate was created. The Galvano plate would be 3 to 8 times the size of the actual coin.

A machine called a Transfer Lathe was used to reduce the coin details onto a die. A tracing tool used to trace the Galvano plate on one end and a cutting tool on the other end would cut the die the actual size of the coin. The final touches were made by hand. This system was used to make all the Morgan dies through 1904 and the 1921 Morgan die was created by a different machine.