Prince Charles of Belgium, Count of Flanders (Dutch: Karel, German: Karl; 10 October 1903 – 1 June 1983) was the second son of Albert I, King of the Belgians and Duchess Elisabeth in Bavaria.
Born in Brussels, he served in lieu of his older brother King Leopold III from 1944 until 1950 as prince regent until Leopold was allowed to return to Belgium.
However, shortly after returning and resuming his monarchical duties, Leopold abdicated in favour of his heir apparent, his elder son Baudouin.
During the Second World War Charles was known as General du Boc, in order to hide his identity for security reasons.
He had an association with RAF Hullavington where many top officers from Allied nations were based or transported to and from.
Author: Unknown Belgian photographer Source: old postcard issued by the Belgian government (presumably issued 1944 or 1945) License: PD-scan (PD-EU-no author disclosure)