By 1959, Sheaffer was leading the market in pen sales with its successful Snorkel pens. The 1950s saw Sheaffer and others move away from the larger and fatter pens of the decades before to long and slender pens, such as the TM or Thin Model pens. The PFM was a bold step in a new direction.
The PFM full line ran until 1963, with only the PFM III and V listed later, and the line was finally discontinued by 1968.
Sheaffer has not made a Snorkel pen since production ceased with the TM and PFM pens.
PFM V – Pen For Men. Model five is distinguished by the gold cap and gold end of the blind cap