10 c. blue, 2 diagonal bisects of different stamps, both with large margins, used together, looking like an ordinary stamp, tied by target handstamp to letter sheet from " SANTIAGO 10 SBRE 55" to Valparaiso. A very fine and extremely unusual letter. Certificates Maier (1983) and BPA (1992) (Scott 5d)
Provenance: Gerhard Blank (Robson Lowe 1991)
