Circa 1800, folded cover to Montevideo with 2-line "BUENOS AYRES" mark (GJ.4) very well applied + "1" rating in pen, VF quality! (Image)

Folded cover to Entre Rios with the marks "RENTA GRAL DE CORREOS DE BUENOS AIRES" (GJ.BUE15) + "FRANCA" with the N inverted (BUE14), both in red, perfectly applied and clear. The combination of these two marks is very rare, GJ.BUE15 is normally seen along with GJ.16 (Image)

GJ.CHI 1, folded cover sent to Buenos Aires with the green mark "ADMON DE CORREOS DE CHIVILCOY", also arrival mark applied on front, VF quality! (Image)