Numbered buttons, cap badges, and shoulder titles — units written in brass.
Military metalwork is designed to identify — which makes it a gift to cataloguers. Numbered regimental buttons run through the 19th century; crowned devices, eagles, fouled anchors, and corps badges each narrow nation and period. Crown shapes matter in British material: the monarch changes the crown.
Shoulder titles, collar dogs, and cap badges carry unit names or abbreviations outright. Check the back too: maker's tablets, lug and slider fittings, and construction (die-struck versus restrike casting) separate originals from the busy reproduction market.
Record device, lettering, crown type, and backmark exactly, and research the unit — a militia button in a field often matches a documented muster or camp. These finds link land to named groups of people more directly than almost anything else you'll dig.
Identifying arrow and spearheads
Identifying swords and daggers