1861, 1¢ blue. Tied by "Millville, N.Y./Jan 6" cds on Leeds Patent Envelope to Flushing, Long Island envelope with vertical perforations at right and 1¢ adhesive placed in "portrait" frame, envelope with original 1862 enclosure, 1¢ adhesive, faults, which was the intent of such type envelopes, Very Fine usage and rare with 1¢, ex-Knapp, Risvold. Scott No. 63  Estimate $2,000 - 3,000. Sometimes called the "First Window Envelope," patented by Benjamin Morrison 19 June, 1860. The following year Lewis W. Leeds of New York, without knowing about Morrison's patent, invented a similar type of envelope. Because of the similarity of the two designs, Leeds had to buy out the Morrison patent on 7 May, 1862. The idea was that the postmarked postage stamp would be on the letter and the envelope could be thrown away, leaving a postal record of the content. This cover could be torn open by the perforations on the right end, tearing the stamp and preventing its reuse if not cancelled. As such, intact envelopes such as this are extremely scarce. $0 (Image)

1861, 1¢ blue. Strip of 3 with fancy square grid cancels (S-E SD-G84) on cover postmarked neat Mason Ohio cds to Springfield o.; upper right corner of right stamp damaged, otherwise Very Fine; with 2010 P.F. certificate. Scott No. 63  Estimate $300 - 400. $0 (Image)