Revised for 2010. In 1952 Sheaffer introduced the Snorkel pen line, equipped with a unique extensible filling tube that allowed the pen to be filled without immersing the tip in ink. The first truly "no wipe" pen that filled from a bottle. The Snorkel is recognized today as one of the most complex filling mechanisms ever made and is prized by collectors. Snorkels were among the most popular pens of the 1960s and have an ardent following today. This calendar celebrates some of the most sought after and popular models.