Was this a grooved record or a strobe disc like they used to sell at Radio Shack? I'm surprised that it took them so long to put strobe markings on the platter and mount the neon lamp.When I worked in a Radio-TV-Appliance shop back in the '60's we used a cardboard test record that you used to determine whether the record player was running at the right speed. Most times when they were off it was because the spindles had crud buildup.