Auction # 2424 ARGENTINA: Special July auction

27/OC/1868 Salta - Buenos Aires, entire letter franked with 5c. (GJ.38) with ADMON DE CORREOS DE SALTA double circle. The long text is about a new law that would reward the invention of a system for the conservation of fresh meat, adaptable to large scale, and the intentions of the sender to present a proposal to the corresponding evaluating committee, etc. Very fine quality, interesting!