This is a rare and valuable 1878 Mexican coin from the Second Republic period. It is a 25 centavos silver coin with a fineness of 0.9 and has been circulated. The KM Number for this coin is 406.9. This particular coin has a low mintage, making it a highly sought-after collectible item. It has not been certified, but its authenticity is guaranteed. The coin is an excellent representation of Mexican numismatic history and would make a great addition to any collection.