The Parker Challenger model was first introduced in 1935 as an economy, or school, pen, although by 1939 De Luxe and Royal De Luxe versions had been introduced. This pen, finished in Rose Marble, is later, as it has a single broad cap ring, and a straight cap clip. The clip, which shows the slightest traces of pitting of the plating to the side, is retained by a peaked black stud, which matches the blind cap. This is  a button filler with a brass button hidden under the "blind cap" on the end of the pen barrel.  The button operates a sprung pressure bar inside the pen, which compresses the rubber ink sac.  This has the advantage of filling the pen by a single press of the button. The ink sac has been replaced.

The imprint on the barrel is clear, and you can read it yourself in the photograph. It reads: "PARKER CHALLENGER  MADE IN U.S.A.      .9.    BY PARKER PEN CO. JANESVILLE,WIS".  

The pen is fitted with a fine Parker nib, stamped "PARKER PEN MADE IN U.S.A.   47.".The pen is in lovely condition and writes smoothly.