It has hall mark CI 25 But unsure what means.

The chain is crafted with intricate details and made of high-quality materials, making it a durable and stylish accessory for any watch. Its unique design features a T-bar that adds an extra touch of elegance to the chain. 

The pocket watch chain is perfect for those who love vintage style and want to add a touch of sophistication to their outfit. Whether you are looking for a chain to complete your pocket watch or simply a stylish accessory, this gold-tone trombone pocket watch chain with T-bar is the perfect choice.