South Africa
Short Paid Aerogramme
Insufficiently Prepaid, Diverted to Surface Mail

Domestic aerogramme (Müller/Wiegand no. 413) used for international correspondence to Germany in Dec 1968.

H/s “Insufficiently / Prepaid” and “Surface” to indicate diversion to surface mail.

The proper surface mail rate for first weight step letters to Germany would have been 5c. Accordingly taxed “5/5”, in which “5” in the numerator stands for double the deficient postage (2 × 2.5c) and “5” in the denominator stands for the surface letter to European destinations.

No German taxation marks. As the first weight step surface letter from Germany to South Africa cost 0.50 DM in 1968, the postage due to be collected from the addressee should have been 5 / 5 × 0.50 DM = 0.50 DM (German Mark).

Below is a comparative example correctly prepaid aerogramme (uprated with 1 1/2 c stamp).

 

References
Müller/Wiegand stands for Müller/Wiegand, Katalog der Aerogramme von Afrika, 1995