CoinWorldTV 1621, Mexico, Philip III. Spanish Colonial 1 Real Cob Coin. Reference: KM-28. Mint Period: 1618-1621 Mint Place: Mexico City Denomination: Cob of 1 Real Ruler: Philip III (Felipe III) of Spain. Diameter: 23mm Weight: 2.94gm Material: Silver Obverse: Crowned shield with Arms of the Spanish line of the House of Habsburg. Reverse: Cross of Jerusalem with lions and cast ...