Schets voor postzegels Nederland 1978 invoering postcode CreatorDumbar, GertDate of creation1977Collection150 years of designs for the Dutch Postal Services in pictures
Voorstudie / schetsontwerp voor postzegels Nederland 1975 Sparen CreatorFallon, AndrewDate of creation1975Collection150 years of designs for the Dutch Postal Services in pictures
Kleurstudie voor Zomerpostzegels Nederland 1976, Landbouwonderwijs CreatorGratama, AbDate of creation1976Collection150 years of designs for the Dutch Postal Services in pictures
Voorstudie voor postzegels Nederland 1988 Holland Europa 88 Filacept CreatorVermeulen, RickDate of creation1988Collection150 years of designs for the Dutch Postal Services in pictures