309. - 320. Corinphila Auktion 24. November - 2. Dezember 2023 Los 1071 Salvador 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 Ausruf 300,00 CHF