INK-o-GRAPH Advertisement, set of 4,1927

INK14  INK-o-GRAPH Advertisement, set of 4,1927, Inkograph Advertisements - Set of four different black and white Inkograph Writing Instrument Advertisements.  Inkograph didn't do oodles of advertising like Parker and Sheaffer, so these are harder to come by than adverts from some of the more famous companies.  Each ad is is in excellent condition, the largest measures 4.75 x 2.5 inches, the smallest and also the earliest advertising an Inkograph for only $1 measures 2 3/8 a 1.5 inches.