GREEN 10c on 2c CARMINE
1880 KING ALFONSO XII POSTAGE ISSUE

MANILA to BARCELONA TELEGRAPH RECEIPT
17 Stamps paying the 21 pesos and 33 centimos rate, via Suez.

SURCHARGE ERRORS
TYPE 12: Green 10c on 2c Postage Inverted Surcharge
3 stamps in strip of 4, Positions 8, 9 and 10.

The 10 cuartos surcharge employed a currency which was discontinued in 1864, the peso duro or peso plata. The currency employed between 1881 and 1888 was the Peso. As such, 10 cuartos equaled 6.5 Centimes de Peso. The telegraph operator likely confused the 10 cuartos for 10 centimes. If the surcharge is figured as 10 centimes, the stamps used pay the full rate of the telegram. However, the actual value of the surcharged stamps resulted in an underpayment of 14 centimes. Why the surcharges were expressed in outdated currencies is unknown, although it is theorized, the device prevented forgery by confusing the potential forger. Unfortunately, the result was confusion for the public and the telegraph operator, many of whom were not alive when the older currencies were employed.