older advertising Epenco fountain pen - Shredded Ralston cereal - cap replaced

Description

Here is an
older advertising Epenco fountain pen promoting Shredded Ralston cereal.  The pen shaft is embossed with a checkerboard and "Shredded Ralston".  The cap color does not match the shaft and appears replaced - although not the  nib and the pocket clip show Epenco.   The pen is empty and there is some wear on the plastic.  There is also some dirt on the nib.
Please see the pictures and ask any questions.
Thank you for looking.
(Inv A15,360)