COLOMBIA. 1873 pattern 1/2 Decimo. Medellín mint. Restrepo P23. Silver. SP-63 (PCGS).Reeded edge. Another uniface 1/2 Decimo pattern, this one with the usual obverse design paired with a reverse that displays the letter R instead of the letter E. The reverse shows some evidence of cracking and failure, along with exceptional cartwheel luster and variegated pastel toning. The obverse is a more even deep slate gray, a bit darker at the rims. Good surface quality and overall visual appeal. Interesting, attractive, and scarce.