Aerogramme van der Wateren No. 2

Small swastikas were pro- jected by the designer in the four corners and in the middle of the top and bottom border of the first aerogram (van der Wateren No. 1, see above). As these swastikas were missing, the first aerogram was not issued but made available to the collectors after cancelling the aerogrammes with the UPU commemorative postmark. Hence mint ones are exceedingly rare.
The second aerogram (van der Wateren No. 2) does have these swastikas. Apart from that it is identical to the first one