This vintage mechanical pencil from the 1950s features a perpetual calendar base and is adorned with the advertisement of Kleber R. Avery. The pencil has a lead diameter of 1.18 mm and is made of celluloid material. It is a continuous twist type pencil with an HB lead grade. The pencil also has a few unique features, such as the perpetual calendar, that add to its charm. It is in used condition, but still functions well. See Photos.