Those are silver 10 centavos from the first half of the 20th century. They should be the size of a U.S. dime. They are .900 silver (like a U.S. dime) and weigh 2.5 grams (like a U.S. dime).

They have bullion value probably equal to a U.S. silver dime, but there may be some rare dates that have additional numismatic value. Overall, if they are all in that condition, their numismatic value is probably minimal.