Button with "Blätterkrone" - leaf crown and the monogram "A" around 1758 / 1800.
Sizes: 24, 20, 18 mm (±1mm)
Theory 1: Austria - Military button - dragoon regiment „Althann“ (noble family: Althann)
Found:
Germany: 1. Saxony / Strausberg
Czech Republic: 1. surroundings of Beneschau - Benešov(Bohemia) , 2. Stanitz - Ždánice - (Jihomoravský kraj - South Moravian Region), 3. between Náchod and Hradec Králové (Královéhradecký kraj - Hradec Králové Region)
Slovakia: 1. Čierna (Košický kraj - Košice Region)
Poland: 1. Dąbrowa Oleśnicka, Słone at Głogów - Groß-Glogau, Kłodzko Valley area, Pielaszkowice near Wrocław, Łomnica and Wałbrzych (Województwo dolnośląskie - Lower Silesian Voivodeship), 2. Leszno (Wielkopolska - Greater Poland)
Any further information about the found location is welcome !
Further theories are welcome. The button collector community will be very grateful if you can contribute to the solution of the riddle.
Sources / additional information:
Wikipedia - List of wars and battles in the 18th century (D)
Wikipedia - Wars and battles involving Prussia
Wikipedia - War of the Austrian Succession
Wikipedia - Silesian Wars
Wikipedia - First Silesian War
Wikipedia - Second Silesian War
Wikipedia - Seven Years' War