El Salvador, Deuda Publica Del Salvador, a late 19th century pre-specimen printer's proof or test print of a 500 (Quinientos) Pesos bank note, single sided in black ink, with cartouche of Mercury to left and 500 to right, with blank spaces for numbers and signatures and marked San Salvador but undated with 18__, with Bradbury Wilkinson Y Ca Grabadores Londres, probably c1870s, it appears to have once been stuck on to another piece of paper as there is damages to the margins and traces of glue to reverse, there is a lot of marks and some staining