In 1935 the country's Latin name on its own stamps changed from Postes Persanes to Postes Iraniennes, and the definitive series that followed is that decision printed fifteen times over. One design, one recess-printed ink per value, one sheet of unbleached wove paper: an oval bust of the Shah held between Achaemenid column shafts and bull capitals, denomination set twice in Latin and Persian numerals.

Nothing in it is tonal. Depth comes from engraved line alone — cross-hatch that thickens, parallel shading that closes up, a guilloche border turned on a rose engine. The system inherits that discipline: flat ink, hard corners, real perforations, and the rule that no single panel ever carries two colors at once.