In Spain, it was customary during the months prior to the birth of a Royal child, to issue a Real Decreto (Royal Decree) to establish the ceremony to present the newborn prince or princess to the king. On May 13, 1862, there was signed a "Real Decreto relativo a la ceremonia de la presentación del infante o infanta de España que de a luz su Magestad la Reina (Maria Luisa Fernanda de Borbón) . .
It seems likely that this inkstand was used to sign this decree. The initials F and B stand for Fernanda and Borbón respectively. On May 17, the queen gave birth to a princess who was christened Doña Maria de la Paz.