cover 1871 and 1872 XU5 to the same addressee in Scotland, each bearing 1867-80 1/-, the former tied by very light "B32" numeral with "BUENOS AIRES" double-arc d.s. on reverse, the latter tied by "BUENOS AIRES" c.d.s. and London arrival numeral, and bearing on reverse Argentine 5c. tied by blue circular "ADMON DE CORREOS/RANCHOS" and small "DUMFRIES" c.d.s.; one 1/- defective, the other with some stained perfs., the XU5 with perimeter faults and filing notes on front. An unusual pair