Introducing Dan Wieden's Musical Ruler 2012 Revised Edition with Guide, a rare and collectible item for music enthusiasts and collectors. This ruler features a musical scale and can be used as a tool for music composition and education. With the included guide, users can learn how to make the most out of this unique item. The book has some wear, specifically on the binding.

This item falls under the Books & Magazines and Antiquarian & Collectible categories, and is perfect for those who appreciate music and its history. Don't miss out on the opportunity to add this special piece to your collection.