The bucket had been used to mix an augmented mortar in. In an attempt to clean it , someone filled it with water and acid.
The acid must have leached something out of the mortar because the liquid was much like a syrup.
Someone dropped a zincoln in the bucket and the acid found/made a hole in the edge of the plating. Once exposed to the acid, it ate the zink creating a gas bubble inside the plating which would eventually float the coin to the surface. Once there , the bubble would pop and the coin would make its way back down through the syrup to the bottom to start the process all over again.
Edited by stoneman227
08/23/2019 09:39 am