Census of 1c Blue, Type I (Scott 5)
- From a discovery in approximately 2013.
- Position 7R1E, full margins to cut in at top, tied by "Wilmington Del. Sep. 5" circular datestamp on light gray printed notice from Wilmington Iron Works dated September 1, 1851, addressed to DuPont & Co. near Wilmington, stamp with light toning in area of portrait
- Siegel 2015 Rarities, Sale 1106, 6/25/2016, lot 3021 - unsold
- PFC 511783 (2013) "IT IS A GENUINE USAGE, THE STAMP WITH LIGHT TONING IN THE AREA OF THE HEAD."