Union Square Post Office, New York N.Y., 1c Black on Dark Green (141L1).
Large margins at sides, just barely in at top and bottom, tied
by "New-York 10 Cts. Apr. 25" integral-rate circular datestamp on 1854 folded letter to Toronto, Canada,
"6" Canadian due handstamp, receiving backstamp, Extremely Fine, the only full cover to Canada with the Union Square Post Office stamp in our records, with 2013 P.F. certificate
Image Magnifier / Download
Power Search for Comparables