The value of 18k gold watch varies with brand, design, technology and other factors. Generally speaking, the purity of 18k gold on watches is about 75%, while the purity of pure gold is about 99%. According to the current market price, the price of 18k gold is around 200 yuan/gram, while the price of pure gold is around 350 yuan/gram. Therefore, the value of 18k gold watch depends on the weight, brand, design and technology of the watch. Generally speaking, the price is between several thousand yuan and tens of thousands of yuan, or even higher.