Well-produced books providing markings, dates of manufacture and approximate value (published in 2001) of military sweetheart brooches.
Military Sweetheart Jewellery Volumes 1, 2 and 3 by Pamela M. Caunt.
WW1 THE COLDSTREAM GUARDS MILITARY SWEETHEART STERLING SILVER BADGE WORLD WAR I
Embroidered Sweetheart Postcard France 1916 WWI Military
MILITARY BADGE MERCHANT NAVY SWEETHEART BROACH 3.25CM X 2.75CM (3767)
MILITARY BADGE SWEETHEART KSLI KING'S SHROPHIRE LIGHT INFANTRY 2.75 X 2.75 1976
MILITARY BADGE MIDDLESEX REGIMENT GILT BRASS SWEETHEART BROOCH BADGE ON BAR