Howdy Myles. I’m assuming you suggest the album has the Facet two tracks pressed on to both sides, and not there are merely two Side two labels on the LP. I’ve hardly ever found that kdr prefix to the catalog variety just before; are you certain it’s not ksd? https://ledzeppelinplatinumrecord32086.bleepblogs.com/27205136/a-simple-key-for-led-zeppelin-gold-records-unveiled