"Keyboard Sword (polytechnician's Tangent) With A Three-sided Hollow Blade "
The keyboard folds down properly, the button that allows it to be tilted works perfectly. No sheath. Decorated with etching and signed in the main recessed panel "Promotion 1899" "Coulaux & Cie" and "Klingenthal" V. Petit fils & Bailhache Paris. Length 103 cm. In original condition, with traces of oxidation.