Watch List notes:

Potosi, Bolivia, uniface trial silver medal, 1863, President de Acha. 3.49 grams, 25mm. Bust of de Acha facing left inside legend AL PRESIDENTE GL. DE LA REPUBLICA 1863. XF with only the barest traces of luster. Note the regular, two-sided issue is 5 grams.

Estimate: $200 - 300