1877 10c red, complete sheet of 50 with complete margins all around, full original gum, very fine and scarce.

1884 "$1" surcharges on 10c red, provisional issue due to currency reform where "$1" equalled one gold peso (valued at one U.S. dollar), very large even margins all around showing dividing lines on four sides (extremely rare thus), cancelled by pen strokes as usual, an excellent example of this very rare stamp, with very few genuine examples known. (Image)