Some further info for you;
In 1958 the following codes were in use
HEGF, Geneva
MAXN, Mildenhall
FFLB, Paris Le Bourget
SVAA ?? SUAA was Uruguay, Agel S. Adami/Melella
OD** was used for Lebanon
SS** was used for the UAE (Egyptian Sector)
SV** was used for Greece
Cheers