Set cover with all values of the CORREO AÉREO serie sent from Larache (Morrocco)
to the famous stamp dealer M. Galvez in Madrid via the Larache-Sevilla connection.
From 1924 no additional airmail fee was claimed for cards and covers on this route;
postage fee for single inland letters was 25 Céntimos between 1922 and 1931. The
special hexagonal airmail cancel was introduced in Spain in 1920 and is still in use today.