EL SALVADOR. Peso, 1904-CAM. Central American Mint. NGC PROOF-61. KM-115.1. Narrow Right Shoulder type. A <strong>VERY RARE</strong> issue as a proof, this radiant specimen features immensely reflective mirrored surfaces that are nearly devoid of toning. Just a hint of burnished cobalt near the lower left of the obverse is all that is observed.