Each badge carried a unique number on its reverse side. The War Office maintained a register which recorded the name of the serviceman issued with the badge in the United Kingdom, and the indivicual unique badge number. The governments of New Zealand, Australia, South Africa, Canada and Rhodesia maintained their own registers of issue, although these were copied to the War office thus enabling a master record to be retained. The Silver War Badges issued by the Empire nations had their identification numbers prefixed with the first letter of the issuing nation. In the United Kingdom if a Silver War Badge was lost, it was not replaced.
Approximately 1,150,000 badges were issued but the numbering system altered, and for family historians this is helpful in identifying when the badge was issued.
Between September 1916 and March 1918, badges were issued with just a number; about 335,000 of these were issued.
Between March 1918 and September 1918, the second series was issued taking the number of badges issued up to 450,000.
Between September 1918 and December 1919 the badges, had a B prefix to the number and some 450,000 were issued.
Between December 1919 and January 1920, badges had an O prefix where around 5,000 were issued.
Between January 1920 and March 1922, the system reverted to just numbers with around 70,000 badges issued.
After April 1918 when the RAF was formed, all RAF personnel were issued with badges prefixed with RAF and over 10,000 badges were issued. The Royal Navy's prefix was RN and there were at least 43,000 badges issued. Also from 1918 servicemen and civilians who served in the Royal Army Medical Corp, VADs, and the QMAAC also received the Silver War Badge.