Lot
948 
1908, 1¢ green, Attleboro perfs. Single showing all full perfs and notch at bottom, on local drop cover with corner card for Attleboro Stamp Co. at upper left, stamp tied by "Attleboro, Mass. Aug 12, 1909" duplex postmark, Extremely Fine, quite certainly the finest known on cover example of this private perforation issue rarity; with 2003 P.F. certificate. Scott No. 343 Estimate $20,000 - 30,000.
Only a few known on cover examples are known to exist. A similar on cover example was offered in the Siegel Rarity Sale of May, 2002 with an undated double oval cancel, with his cover being far superior & desirable. Only one other cover is certified by the Philatelic Foundation.
Realized: $14,000