I'd propose this one: the duplicator had already received a safety dub before WB's own master got worn out. The manufacturer here, "Magtec"/"Stereotape", had very good quality control and; as they were a L.A.-based outfit: the provenance of the source -at the time- would not have been the kind of afterthought like tapes the record labels shipped to Ampex's midwestern location (otherwise) might have. However, this one goes for $200-and-up.