During the First World War, goods were in short supply and prices rose sharply.
It was decided to replace the annual award of prizes with a certificate indicating
that a prize would have, otherwise, been awarded.
Each of these certificates may bear the imprint 'Headmaster' or 'Headmistress'.
An image of a certificate for a similar purpose, but for year 1931-1932, has been reported.
Possibly, deep cuts were required during the years of the Great Depression.