Third Test : 04 th of June 1936 : Albert Plage - Knocke (Duinbergen)
The last known test Roberti conducted in Heyst-aan-Zee - Duinbergen was on the 04 th of June 1936.
Number of rockets launched : 2
Covers from the rocket "Barbara"
The second rocket that was launched was the "Albertine"
The first cover shows us a picture of Roberti and one of his rockets . As we look a bit closer,you'll see that the picture of the rocket is no more than a drawing!! The covers are signed by Roberti and show private cancellations and cinderellas by the N R B. The official stamp is cancelled by the Belgian Postoffice allthough they didn't collaborate on this third test.