This resulted in the foils taking an impression of each face of the coin simultaeously, also incidentally transferred to the lead sheets (in incuse).
The final sandwich was then trimmed to size, possibly with a 'pastry cutter' type tool, forming a circular coin.
[3] Unlike most fourrée coins, the technique does not require a press and counterfeit dies in order to manufacture the forgeries.
This strongly suggests that the forger used genuine coins, or metal cut from them (clipping), to supply the material for the foils.
The term "cliché" is used in French numismatics to refer to a thin electrotype copy of a coin or medal with the sides displayed separately so that they can both be seen at once.