Belgian Letter Box, or should I say, Brievenbus

While on holiday I came across this wonderfully ornate, and sturdy, postbox located on the square called Regentieplein near the railway station in the Belgian town of Sint-Niklaas.  Unlike the GB boxes the design is

repeated on the back with the addition of the Belgian Lion from their coat of arms and the post office name in French - Postes, and Dutch - Posterijen.  I know nothing about Belgian postboxes but happily last year for Stamp Day the Belgian post office  issued a miniature sheet on old and new post boxes so from that I know that this box dates from the 1930s, a time when a box this size was a must.