Recently received in a lot this Spain 1874 10 peseta (high value of set), Scott 210, Edifil 152.
Has a single line of partially punched perfins horizontally across. Trying to figure out what the significance of this is. Doesn't match with perfins I'm familiar with, nothing mentioned in the Edifil classic Spain catalogue, internet searching not successful so far. Also trying to decipher the writing on the back, perhaps an experts signature?
Anyone familiar with this on classic Spain stamps?