Netherlands 1931 Air Mail
From Stamps of the World
- Issue Date : September 1931
- Designed by : Piet Zwart
- Printed by : Joh.Enschedé, Haarlem
- Print Process : Photogravure
- Perforations : 12.50 and 14¼:13¼
- Meant for Air Mail, but also used for regular mail
- Valid until 31 March 1944
![]() Airplanes and Queen Wilhelmina. 6 cents for the letter and 30 cents as Air-rate. See also http://www.stampsoftheworld.co.uk/wiki/Netherlands_1931-1933_Queen_Wilhelmina_Photomontage |