Mexico, 50 Centavos, 1921, Mexico CityESTADOS UNIDOS MEXICANOSEagle standing facing on cactus, head right, snake in beak, purity rating across fields50 / CENTAVOSDenomination in center, Liberty cap and rays above, date and mint mark below Incuse edge lettering: INDEPENDENCIA Y LIBERTAD 8.3333g, 0.7200 Silver, .1929 ASW, 27mmMintage: 21,864,000KM 447