When selecting a watch manufacturer, you must prioritize the movement type, as it dictates the watch's reliability and price point. Common choices include Japanese Quartz (e.g., Miyota or Seiko) for cost-effectiveness and precision, or Swiss Movements (e.g., ETA or Ronda) for luxury positioning. Additionally, specify the case material, preferably 316L Stainless Steel for its corrosion resistance and hypoallergenic properties. For the crystal, Sapphire Glass is the industry standard for high-end scratch resistance, while Mineral Glass serves as a budget-friendly alternative. Ensure the Water Resistance (ATM) rating aligns with your target market, typically 3ATM for dress watches and 10ATM or higher for sports/diver watches.