Mint State Uncirculated Mexico silver 8 reales coin.Struck at Guanajuato Mint (Go mint mark), assayer SM.Rare overdate variety: 1878/7.Encapsulated in older PCGS holder, when PCGS was not using Dunigan catalog numbers & did not note the clear overdate.Certified by PCGS to MS 62, lustrous & reflective surfaces, no regions of gray tone.Dunigan Go59: "This date is somewhat scarce. Normally this coin comes Very Fine, but is available in Extremely Fine and Almost Uncirculated condition. Uncirculated specimens are very scarce to rare."