Not a cartridge box, but turned up by one of the forum members, is a cap box with the name McKenzie impressed on the front. I knew the box was rare when I first saw it, but did not have a clue how so, until I went to the Richmond Show and saw it in person.
The member sold it to another on the forum, who in turn sold it to a dealer out of Florida, for a mid 4 figure number! There are only four known and Confederate accouterment expert Michael Kramer had two, but sold one, the one pictured and one in the Milwaukee History Museum. They were made by a shoemaker in Charleston, SC.
I asked the dealer if he was going to sell it and he said that no it was going into his collection.
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