The Vintage Keuffel & Esser Brass Abney Level Clinometer is a rare and valuable piece of surveying equipment from the early 20th century. Made by the renowned Keuffel & Esser company, this brass clinometer features a precision Abney level for measuring slope and inclination. It comes with its original leather case, adding to its historical and collectible value. With its elegant design and functionality, this vintage clinometer would make a prized addition to any engineering or surveying enthusiast's collection.