Leonardo Da Vinci Helicopter Wooden Model Kit by Pathfinders

Based on his drawing from the Codex Atlanticus, Leonardo's Arial screw was to use the power of 4 men to push the canopy and the outer ring.

Box is sealed but does have a couple of marks (see photos)

Easy to make in about an hour

Natural, untreated wood

All pieces are pre-cut and ready to go

Parts are pegged for extra strength