Gold Doubloons and Silver Pieces of Eight These authentic replica coins were first poured into strips, then cut into coin planchet. One at a time the planchet are placed on top of a coin die, then another coin die is placed on top and hit with a hammer. This impresses both sides of the coin planchet. The coin is weighed and any excess is chipped away. No two coins were the same. In 1733, the Screw Press was used, which eliminated irregular stamp patterns. The coin was set between two dies and the top die screwed down to the bottom die using the power of two massive weights opposing each other above the press.