Pining for "DMSentra"
The balancer that has the marks can't be flipped. It's probable that the marks are covered with gunk, making them hard to see. Turn the crank by hand from the pass wheelwell and feel for the notches that make up the marks. Clean the notches good with a rag and brake parts or carburetor cleaner. The you can wet your finger with the paint color of your choice, smear it in the notches and wipe the surface clean leaving the notches colored. A grease pencil works well too instead of paint but doesn't last as long.