Lot 61753 – 1861 60c brown lilac pair used with Buenos Aires cds

1861 60c brown lilac, a well margined vertical pair tied to piece by Montevideo ds, as well as by « BUENOS AIRES » cds dated 9.1.1864, the pair correctly paying a single rate to Argentina; an exceedingly scarce usage of an Argentinean cancellation on Uruguayan stamp, most probably unique on a multiple; cert. Hernández Rocha (2008); ex Scott.