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"Rust" on Morgan dollar dies.
The quote below comes from VAMworld's current “VAM of the Week” 1897-P VAM-6A. Does anyone know where the following concept originated? Pitting on the reverse of Morgan Dollars isn't uncommon - the reverse die was the "anvil," the bottom die and as such able to capture pooled water and then rust … -
Re: "Rust" on Morgan dollar dies.
The Big VAM book calls the die "pitted" but does not call it due to rust. I don't know. There aren't any reported from Carson City. Since it's mostly New Orleans and a few Philadelphia dies and a very few San Francisco dies this happens to, I assume it's something in the weather. More humidity - more chance of rust = more… -
Re: "Rust" on Morgan dollar dies.
I don't know the answer but is it possible pitting could occur without the rust? If water did collect on the reverse die, could that water be vaporized during the striking process from heat and pressure? Cavitation air bubbles can cause pitting of ship's propellers. I wonder if something like this could occur over time on… -
Re: "Rust" on Morgan dollar dies.
I haven't heard of that, either. Not sure how the water would pool on the high points of the die and then not be vaporized after one or two coins were struck. -
Re: "Rust" on Morgan dollar dies.
In my library somewhere is the explanation that the dies were stored on shelves with grease covering them to protect them from the acidic atmospheres found in the mints. Occasionally one die would be stored with no grease, or partially greased, and the acid attacked the surface of the dies and then the resulting use of the… -
Re: "Rust" on Morgan dollar dies.
Aside from the fact that we know the Reverse Dies were the anvil dies, because every single Partial Collar Morgan dollar I've ever seen has the partial reeding on the reverse side, I've NEVER heard of this 'water pooling' concept. There's grease around the machinery, but unless the presses are being used in the… -
Re: "Rust" on Morgan dollar dies.
The part about water pooling on the reverse die seemed strange, and odd to see that claim on VAMworld's featured coin. Anyone know where the VAMworld poster got his info.?
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