Auction # 2312 ARGENTINA: Special April auction

GJ.17a, 1P. blue with DOUBLE IMPRESSION (very notable in the bottom half of the stamp), very worn impression and completely illegible below, with DOUBLE cancellation: pen cancel of origin of San Nicolás, and arrival Montevideo datestamp (+100%). Pen cancels were made with a metal tip and agressive inks that eat away the paper (as in this stamp), which is normal and can be observed from the back of the stamp. Spectacular and very rare example, catalog value US$275+