Sociedad de Cambios, a sheet of unissued 960-Reis (4), Montevideo, 1 July 1856, black and white, yellow underprint at centre, ostrich top centre, value at each corner, counterfoil at left (cf PS.431 for issuer), this type and style completely unlike the notes illustrated in Pick, watermarked paper, engraved by Webb & Hunt, Liverpool, good extremely fine, very rare