1918, mixed franking cover from the American Consular Service in Bahia, Brazil to Haiti, via Philadelphia, franked with Brazil 1915 200r Deodoro da Fonseca (178), and US 3¢ Washington (501), with two Haiti postage dues (J17) plus two postage due marks at right, and six US Post Office Seals (OX12). A well-traveled cover with a bit of history, Fine. Est. $75-100 (Image)

Est. $75-100

1904, registered cover from Boston to London, England, a 2¢ Columbian Exposition stationery envelope with additional 1¢ and 15¢ Columbians. Reverse shows arrival c.d.s., Fine to Very Fine, colorful. Scott U349, 230, 238. Est. $75-100 (Image)

Est. $75-100

1868, folded letter sheet from New York to France, franked with 15¢ black. A lovely neat cover with the postmarks showing clearly, Very Fine. Scott 77; $225. Est. $100-150 (Image)

Est. $100-150

1859, cover from Louisville, Ky. to Wurttemberg, Germany (Scott 26, 36), franked with two 3¢ rose and two 12¢ black, prepaying the double letter rate to Wurttemberg via the US-Hamburg Treaty, and all tied by blue 7-bar circular grids. Front shows blue LOUISVILLE / KY c.d.s. and PAID handstamp, plus red N.YORK / PAID / HAMB.PKT.A c.d.s. with integral "20" cent credit. Reverse bears HAMBURG and STUTTGART transits, plus partial SCHONDORF arrival c.d.s. A scarce transatlantic cover, showing the 15 cent per 1/2 ounce rate to Wurttemberg under the US-Hamburg Convention. Scott No. 26,36. (Photo), Very Fine. Est. $120-150 (Image)

Est. $120-150

1878, registered cover from New York to Leipzig, Germany, franked with 15¢ Bank Note. Note the German entry label "Vom Auslande / über Bremen" (From Abroad, via Bremen), and registered New York handstamp, Fine to Very Fine, attractive. Scott 163. Est. $100-150 (Image)

Est. $100-150

1888, mixed franking cover to the United States from Germany (Scott 213), franked with 20pf ultramarine "Pfennig" issue (Sc 40), prepaying the UPU letter rate. Reverse shows NEW YORK/PAID ALL opera glass transit and UPLAND arrival datestamp. Letter readdressed and franked with US 2¢ Bank Note, tied by CHESTER/PA duplex cancel, and showing MONTROSE arrival datestamp on reverse applied on re-direction. A scarce combination franking, Fine to Very Fine. Est. $120-150 (Image)

Est. $120-150

1904, cover from Cleveland, Ohio to Germany, franked with 1904 10¢ Louisiana Purchase, with arrival postmark on reverse, Fine to Very Fine. Scott 327; $125. Est. $40-60 (Image)

Est. $40-60

1865, cover from New York to Palermo, Italy, franked with three 3¢ rose and single 12¢ black 1861 issue, prepaying the 21 cent single weight letter rate to Italy via the French mails. Reverse bears GENOVA transit and PALERMO arrival datestamps. A beautiful transatlantic cover, with scarce franking, Very Fine. Scott 65, 69. Est. $120-150 (Image)

Est. $120-150

1868, cover from San Francisco to Guadalajara, Mexico, franked with 1861 10¢ green, prepaying the single weight letter rate. Front shows red SAN FRANCISCO CAL./PAID datestamp, manuscript "via Manzanillo" transit, plus "2" reales postage due handstamp. Nice franking, Fine to Very Fine. Scott 68. Est. $120-150 (Image)

Est. $120-150

1889, underpaid cover from Castle Rock, Colorado to Sweden, franked with two 5¢ Bank Notes (some toning), underpaying the triple weight UPU letter rate to Sweden. Front shows opera glass "T/25 CENTIMES" handstamp indicating the underpayment, plus manuscript "40" öre postage due notation. Reverse bears two 20ö second issue Swedish postage due stamps (Sc J17) all tied by FILIPSTAD arrival c.d.s. Unusual underpaid cover with scarce postage due franking, Fine to Very Fine. Scott 216. Est. $100-150 (Image)

Est. $100-150

1869, insufficiently paid cover from New York to Switzerland, franked with 10¢ "F" grill, underpaying the 15 cent single weight letter rate via closed mails through England. Front shows INSUFFICIENTLY PAID handstamp with manuscript "5" cent deficiency, VIA OSTENDE handstamp, plus manuscript "45" centime postage due. Reverse bears ARGAU Swiss transit plus ZURZACH arrival c.d.s., and with NEW YORK / BR.TRANSIT departure. A very unusual insufficiently prepaid letter under the US-Swiss Convention, showing scarce use of the 10 cent grilled stamp, Fine to Very Fine. Scott 96; $285. Est. $120-150 (Image)

Est. $120-150