Yes, Switzerland adopted seals in the18th century. The most common head of the Queen (the head of the goddess Helvi Tia) represents 18K gold (0.750). Before 1995, Swiss watch cases were marked with silver watches in addition to gold. Different animals use different colors as silver labels, 0.935 for lions, 0.925 (striped silver, the most common 925, commonly known as pure silver) for ducks and 0.800 for turkeys. Platinum, the precious metal "King", is often used in jewelry and rarely used in watches. Generally, Pt950(0.950, Pt900 and Pt850) is common, and goat head (commonly known as antelope head) is the symbol. 18k gold watch Only the head of the Queen can prove that it is 18k gold.