The Waltham 12s Pocket Watch Mainspring No.2224A NOS by Miracle Power is a high-quality replacement part for a Waltham pocket watch. Made of durable steel and featuring a silver color, this mainspring is specifically designed to be compatible with the Waltham brand and model 2224A. With its Swiss-made construction and reliable performance, this mainspring ensures that your pocket watch continues to function accurately and efficiently. Perfect for watchmakers and collectors looking to maintain the precision and authenticity of their timepieces.