Well-produced books providing markings, dates of manufacture and approximate value (published in 2001) of military sweetheart brooches.
WWII 1944 US Army Military Sweetheart Bracelet Trench Art Maples France Itlay
1902 + Rose Gold Boer War Military Sweetheart Necklace Trench Art Style Pendant
Military sweetheart brooches x 4 RASC, RE, RM and Bapaume
Feldzug 1914-1918 5 Volumes German Military History
WW1 Canadian Sweetheart Brooch – Mother of Pearl & Maple Leaf Military Pin
British Royal Military Police Sweetheart Handkerchief with Embroidered Badge