Lot
1811 
Leed's "Stamp-Sealing and Post-Mark-Preserving Envelopes" Circular, two-page circular only with 1¢ blue (63) affixed to back page, over lattice and cancelled by "New York Oct 23 '62" cds; some separation and small flaws, F.-V.F. Scott No. 63 Estimate $1,500 - 2,000.
ONE OF ONLY TWO RECORDED EXAMPLES OF THIS AMAZING LEEDS & FRANKLIN PATENT ENVELOPE CIRCULAR.
The illustrated circular shows an example of the Leeds & Franklin's Patent envelopes and a list of ten reasons for using them including security against impertinent intrusion. This circular was inside a Leeds envelope. A key item to the collector of patent envelopes.
Realized: $5,500