EXTREMELY FINE. ONE OF ONLY FIVE RECORDED EXAMPLES OF THIS NATIONAL BANK NOTE COMPANY 1861 ISSUE ENVELOPE ESSAY, AND THE ONLY EXAMPLE IN DEEP CARMINE.
A review using Power Search reveals the rarity of these National Bank Note Company envelope essays. Search using the term "Undersander" and more than 100 envelopes come up, but nearly all are 1869 Pictorial or 1870 Bank Note Issues. None we have sold come from the 1861 Issue. These 1c envelopes and the 3c envelopes that follow are among the great essay-proof rarities of the 1861 Issue.
Undersander value, which we believe is very out of date