Los 2591
1915, 'Presidents', proof for proposed 'Balmaceda' 4 c. value, two imperforated examples in pale rose and in sage-green (unfinished and without lines round figures of value) and a perforated example printed in brown (unissued); a scarce and attractive trio, the Balmaceda head-plate being used for the issued 5 peso value, Huber certificate
