This K&E Paragon drafting pen, model No. 836, is a vintage gem from Germany that dates back to the 1950s. It comes in its original box and is a must-have for collectors of drafting tools. The brand, Keuffel & Esser, is known for producing high-quality instruments for engineering and drafting, and this pen is no exception. Its intricate design and precision make it a valuable addition to any collection. The pen has been well-maintained and is in excellent working condition.