A beautifully engraved commemorative issued by Spain in 1997 for Día del Sello (Stamp Day).
The design features an ornate historic boca de buzón—a traditional Spanish mailbox slot—with rich detailing typical of classical Spanish postal architecture.
Printed by the F.N.M.T., the stamp showcases fine line engraving and a bold vertical layout with “Correos España” prominently inscribed.
A popular thematic issue among collectors of postal history, architecture, and stamp-day commemoratives.
Ideal for Spain specialists and those curating a postal-thematics collection.