We have added another great sign to our rotating sign collection. OK Used Cars was Chevy's brand name for their used-car trade-in division, started in the mid-1920s. The "famous red O.K. tag system," as one 1928 newspaper ad called it, "was a checklist that showed what parts of the car had been checked and reconditioned prior to throwing it out on the lot." Now with our rotating version of this famous sign, you can have a respectable used car lot on your layout.