This 1973 O-Pee-Chee Baseball All Series wax box comes with the original advertising slip for the retailer. "New for '73 One Series Baseball...with all 660 cards!" All cards from the 1973 OPC baseball issue are possible in this unopened treasure. Thirty-six untouched wax packs Packs are NM-MT to Mint. Display box shows some staining on the bottom o/w is NRMT. Look for high-grade cards like Mike Schmidt's rookie, Nolan Ryan, Reggie Jackson, Munson, Carlton, Yaz, etc.