Additional monochromatic stamps of similar design to C-3 were also issued contemporaneously with these rate changes in 16 cent (green) and 6 cent (orange) denominations.
Curtiss JN-4 | 1918 flu pandemic | 1918 | Jenny Lind | Jenny Agutter | Jenny McCarthy | United Kingdom general election, 1918 | Curtiss Aeroplane and Motor Company | 867-5309/Jenny | Jenny Thompson | Glenn Curtiss | The Jenny Jones Show | Jenny Eclair | Curtiss P-40 Warhawk | airmail | Jenny Owen Youngs | Jenny Holzer | Hans Jenny | Curtiss-Wright | Curtiss | 1918 in baseball | Stamps, Arkansas | Roy Curtiss | Jenny Wormald | Jenny Wolf | Jenny Wiley | Jenny | stamps | SS City of Los Angeles (1918) | SS ''City of Los Angeles'' (1918) |