5CX

5CX3000A-RFPR, 5CX1500B-RFPR-ECO -ND Tube, RFP or Econco, No "dud" core to exch, 5CX1500B-RFPR Tube, rfp rebuilt on cust Dud core or with exch core, 5CX1500A-RFPR-ND Tube, transmitting rfp rebuilt, No "dud" core to exch, 5CX1500A-RFPR Tube,transmiiting rfp rebuilt on cust, Dud core or with exch core,