MEXICO. 500 Pesos, 1988-Mo. Mexico City Mint. NGC MS-65. Fr-190; KM-534. Mintage: 611. Commemorating the 50th anniversary of the nationalization of the oil industry. The only example at this level, and exceeded by just one other in the NGC census, this <strong>VERY RARE</strong> celebratory issue presents great brilliance and radiance, along with a hint of frosting to the devices. Its counterpart, the 1000 Pesos denomination, recently realized a total of $5,280 in our February 2021 CCO auction (lot 74188).