1999 Mexico Silver Libertad 1 Onza Ngc Ms 64 Extremely Scarce Low Mintage Key April 4, 2025admin 1999 MEXICO SILVER LIBERTAD 1 ONZA NGC MS 64 EXTREMELY SCARCE LOW MINTAGE KEY. WITH CONEJO COINS EXCLUSIVE AZTEC CALENDAR NGC LABEL!!!!!!!!!!!!!!!!!!!!!!!!!!! Share