This HR Mainspring Gauge is a must-have tool for watchmakers and enthusiasts. Made of high-quality brass, it allows you to accurately measure and determine the strength of mainsprings for both Dennison and metric systems. The gauge was crafted in France, ensuring its durability and precision.

This tool is an essential addition to any watchmaker's toolkit. It is suitable for use with various watch brands, including HR, and its quality is unmatched. The HR Brass Mainspring Gauge is perfect for those who value accuracy and reliability in their work.