Pay attention to the materials used in the watch. Premium watches often feature cases made of stainless steel or titanium and use sapphire crystal for the watch face, which is highly durable and scratch-resistant. Also, check the water resistance rating to make sure it suits your dad's lifestyle. If he plans to wear it daily, you might want to look for additional features like a date function, chronograph, or other complications that he would appreciate. Lastly, consider the style of the watch. Whether he prefers a sporty, classic, or unique design, choosing a style that matches his taste is key. Also, there's an option to get Patek Philippe replica suggestion. As I noticed, some replicas can look quite convincing.