Auction #1923 ARGENTINA: Selection of good lots, rarities and "special material"

Double crossing of the Atlantic: Buenos Aires (29/AP/1861) - Southampton (6/JUN) - New York (20/JUN): Complete folded letter carried per steamships Mersey and Magdalena, on reverse marking of British Postal Agency, transit strike of London, on front manuscript dues and New York arrival handstamp, VF quality, interesting.