This Bal-Staffs balance staff is a must-have for anyone who owns a Gruen 400 watch. Made in Switzerland, this high-quality piece is durable and long-lasting. The item is brand new and comes with tags for added assurance.

The Bal-Staffs balance staff is compatible with Gruen watches, and weighs only 1 gram. This makes it the perfect replacement part for your watch. Don't miss out on this opportunity to upgrade your Gruen watch with this reliable balance staff.