During the first World War he was mentioned in despatches. In the latter years of his army service, Studd was aide-de-camp to King George VI.
Studd only took up philately seriously after his retirement from the Army. His first collections were of the stamps of Bechuanaland and Norway.
He later specialised in Canada before moving on to the Epaulettes and Medallion issues of Belgium.
He made a study of the maritime cancellations of the world and in 1970 gave a display of the Quetzal issues of Guatemala to the Royal Philatelic Society London, of which he had been a member since 1924 (Fellow 1927).