Here are a some more pictures displaying the year 1930.
The picture with the signature of architect Pierre Devos is to be found in the building that hosted the headquarters of the Belgian Red Cross. Note the picture with the name of the building contractor.
Three other pictures correspond to a a building in the Chaussée de Louvain. The interesting detail about this building is that, while on the top right part of the façade the year 1930 is displayed, it is the year 1912 that appears at the top left part.
The last picture is of a house by architect Paul Martin.