This Greek issue features a red 1-drachma revenue stamp from the early 20th-century series, later revalidated for airmail use during the WWII period. The bold airplane overprint in red transforms a fiscal stamp into emergency postal currency—a practice common in Greece’s wartime shortages. The classical Greek columnar design, ornamental scrolls, and the large “1 ΔΡ.” value remain intact beneath the striking aircraft silhouette. Such provisional overprints are prized by specialists for their varieties, print differences, and postal-historical context, reflecting Greece’s improvised postal operations under occupation. A desirable addition for collectors of Greece, airmail provisionals, and revenue-to-postage conversions.