Vintage LEGO instruction manual/ insert sheet, "Gear Instructions"

from the early 1960s, when LEGO was distributed in the US by Samsonite

single sheet folded into quarters; see pics for scale

This manual would have guided users on how to build various mechanisms using gears included in the set. The image highlights the educational aspect of LEGO, focusing on teaching the principles of gears and mechanics. The instructions, though simple, were essential for understanding how to create movement and power transmission with LEGO gears. 

pre-owned with minor wear from age & use as shown; no markings or tears