Made in Canada in the 1930s this model and closely resembles the other Duofolds of the same era. It is a button filling pen..  The blind cap unscrews from the end revealing a small brass button which operates a spring-loaded pressure bar inside the barrel to compress the ink sac. This is a very simple and effective filling system much favoured by Parker.  It has an excellent, fresh cosmetic appearance, which for its age is remarkable. The ink sac has been replaced. The imprint on the barrel is clear and can be read easily: " PARKER    GEO.S.PARKER  DUOFOLD  MADE IN CANADA". 

The pen cap has a ball end clip, which precedes the more well known Parker arrow design.  It has two narrow  cap bands. The clip is stamped "PAT  SEP  5  16   PARKER"  

The pen is fitted with a medium Canadian Duofold nib, stamped "PARKER  DUOFOLD  PEN  CANADA  E".