Auction 309-320 - Europe & Overseas - Day 3

1874: 2 r. green, optd. by small 'Contra Sello 1874' in black, used on 1875 cover to Paris cancelled by framed FRANCO handstamp, with 'San Salvador / Salvador' despatch cds (Jan 14) in black. Circular 'PANAMA / TRANSIT' datestamp of transit (Jan 27) in black, thence via London (March 1) where framed "GB / 1F 90c." Accountancy marking applied in black. Charged '15' décimes on arrival A very rare stamp on letter. Cert. Moorhousee (2005), Scheller (2008).