Actual OPC errors
 

Been thinking lately that the quality control in terms of typos is much better for OPC issues than Topps. It must have been released later in the year. I did however notice that the 1974 OPC #599 rookies card has Frieslebein on Washington! I think all the other cards in the sets have the Padres correctly identified as Padres. Show us your OPC errors (not print defect kind of errors, just regular old typo or incorrect text/photo errors).