This is oner of the many Snorkel models offered by Sheaffer in the early 1950's. I've got to be honest and say that I don't know which model it is, it looks like a Cadet but I am not sure if these were available with the Snorkel Mechanism. It was made in the USA around 1952 and is finished in Pastel Green with chrome trim.a gold filled cap band and clip.
The pen is fitted with a open 14ct gold nib which writes with a super smooth Extra Fine line.
The snorkel filling system was unique to Sheaffer and consisted of a narrow tube that extended out from under the nib. This tube is dipped in the ink bottle and used to draw up the ink into the reservoir. This keeps the nib clean and it was an efficient system that worked very well.
The mechanism on this pen has been fully serviced. The pen is in good condition with very minor scratches and wear marks.