This is a Davis Mark 25 Sextant that was used only a few times. The Davis Mark 25 Master Sextant Model # 025 is the top-of-the-line Davis plastic sextant. In perfect condition - no corrosion or damage. Includes case and all attachments, case foam in excellent condition. . Included with it is an Artificial Horizon for practicing sights on land where a distant horizon is not visible. Also included are six books for learning and instruction. Sold as a unit. My offshore cruising days ended before I really learned to appreciate the device. Total weight is 18 pounds. Buyer pays shipping charges. PayPal payment only. Shipping to contiguous US only. No foreign sales.