Why a saved game instead of doing it yourself?
This is how it goes:
Press the Right button for a while, until you have a control over the top thumbler. Keep rotating it until there's a space between the thumbler and the wall.
Then, press the Left button, until you have a control over the second thumbler, and rotate it until it's in the same position as the top one.
Repeat this procedure for the other two thumblers as well, and then use the scythe on the thumblers. If it stays in, it means you have the correct combination.
Then open the handle, and voila!