Lego Gravel Quarry Set 360-1 also sold as set 580-1 Brick Yard.
Vintage 1974

Complete set with instructions, no box

The handle on the conveyor belt turns to move the "rocks" up through the quarry where they can fall off into the waiting dump truck.
The crane rolls back and forth on the rails. 
The handle on the crane's side raises and lowers the scoop so it can move "rocks." 
You can pinch the handles on the top of the scoop to open and close it so it can scoop up or unload "rocks."
I replaced the original string because it had been worn out with play.

The original instructions are not in great shape (in several pieces, see photo), so I have included printed copies of the pages that I found online (see photo).

All profits from your purchase will be donated to One Tree Planted for planting trees. $1=1tree planted.

Buy more than 1 item and save on postage.