Kochler's modification of Petit's tourniquet, brass screw clamp and pressure pads only, c. 1780 Kochler's modification of Petit's tourniquet 1751-1850
Tourniquet, Petit's type, brass screw device, and pad on an adjustable strap, by Ferguson, c. 1840 Tourniquet, Petit's type 1811-1860