This striking El Salvador definitive features a finely engraved view of the National Palace, originally issued as a 29 centavos black high-value. The stamp was later repurposed through a bold blue provisional surcharge reading “26 cts.”, applied during a period of postal rate adjustments. Such surcharges are highly collectible due to their limited use and numerous specialist varieties. The crisp black frame, ornate scrollwork, and vibrant blue overprint give this issue strong visual appeal. A classic example of early Salvadoran postal administration adapting existing stocks to meet new rate demands.