1636, Mexico, Philip IV. Spanish Silver 4 Reales Silver Cob Coin Assayer: P (1636-1665) Mint Period: 1636-1665 Mint Place: Mexico City (oM) Ruler: Philip IV (Felipe IV) of Spain. Reference: Calico Type 147, KM-38. Denomination: Cob of 4 Reales (½ Piece of Eight) Condition: Crudely struck as usual, minor deposits and scratches, otherwise VF+ Weight: 13.43gm Diameter: 30mm Mat ...