1858, Victoria 2d. blue as horizontal pair and 1873 3d. rose 4 singles tied by barely legibly strikes of barred "F85" to folded lettersheet with adjacent fordwarding agents cachet and cds. "MAYAGUEZ PORTO RICO DE 11 74" to Genoa, adhesives small imperfections, one 3d. was affixed with lower part torn away, a scarce and attractive entirernrnProvenance: Robson Lowe (1957) (Image 1) (Image 2) (Image)

1867, Victoria 2sh. blue and 1873 3d. rose tied duplex "C61" "PORTO RICO MAR 24 77" to folded letter to Genoa, finernrnProvenance: "The Glassco Collection" (Robson Lowe, 1969) (Image 1) (Image 2) (Image)

1873, Victoria 1sh. green as horizontal pair together with two singles 1865 4d. orange-red tied by barred "F85" to folded lettersheet with adjacent cds. "MAYAGUEZ PORTO RICO DE 11 74" to Genoa, filing fold through one 4d. otherwise a fine and scarce entire (Image 1) (Image 2) (Image)

1873, Victoria 1sh. green as horizontal pair togehter with 3d. rose tied by barred "F85" to folded lettersheet with adjacent cds. "MAYAGUEZ PORTO RICO AU 10 76" to Genoa, a very fine and handsome double rate usage, signed Diena with certificate (1985) (Image 1) (Image 2) (Image 3) (Image)

1873, Victoria 1sh. green with additional franking tied by barred "F85" to folded letter with adjacent cds. "MAYAGUEZ PORTO RICO AP 10 76" to Genoa, a very fine and attractive entire (Image 1) (Image 2) (Image)

1870, folded letter dated "Mayaguez 23 Mayo 1870" endorsed "Via de Inglaterra" to Genoa with accountancy marking "G.B. 1F60C" and cds. "ANGL. AMB. CALAIS 10 JUN 70" alongside, upon arrival charged "20" decimes thus postage due 2l. applied and tied by cds., a fine and attractive entire (Image 1) (Image 2) (Image)

1873, Amadeus 50c. brown, two horizontal pairs tied by "Parilla" cancel to folded lettersheet endorsed "Via inglesa", considered unpaid for the transatlantic journey thus charged "17" upon delivery and postage due 1l. applied, right stamp with small tear, otherwise a fine and attractive entire, certificates PF (1984) and CEM (1985) (Image 1) (Image 2) (Image 3) (Image)

1879, Alfons XII. 5c. lilac-red, 10c. brown and 25c. blue with illegible cds. on folded lettersheet to Genoa, vertical fold through 5c. and some minor imperfections, still an scarce and attractive entire (Image 1) (Image 2) (Image)

1870, fifth weight unpaid folded lettersheet from Puerto Rico to St. Thomas with ship "Neva", there transshiped onto the "Seine" to Plymouth from there to Genoa, accountancy marking "G.B. 1F60C" and French Italian exchange marking "F*56" applied, upon arrival charged and postage due 1l. single and 2l. as vertical applied, all tied by cds. "GENOVA", adhesives with sime imperfections, scarcern  (Image 1) (Image 2) (Image)

1878, Alfons XII. 25c. green two singles tied by oval "PORTO RICO 1 NOV 78" to folded lettersheet to Genoa with adjacent cds. "LIGNE PAQ. Fr. NO 3 1 NOV 78", fine (Image 1) (Image 2) (Image)

"AGUADILLA" blue straight-line on small envelope to Puerto Rico, a very fine entire (Image 1) (Image 2) (Image)

"AGUADILA PORTO RICO 8 NOV 63" cds. with large handstamp "A" (prepaid) on official cover front with manuscript "Vo Bo" (Visto Bueno)  for free at upper left, couple worm holes, fine (Image 1) (Image 2) (Image)

"ARECIBO" rare red straight-line on small cover with faded address, some worm holes, otherwise fine (Image 1) (Image 2) (Image)

"ARROYO" blue straight-line on folded letter to Ponce, very fine (Image 1) (Image 2) (Image)

"CAGUAS." red straight-line on folded letter dated "Obre 28 del 1844" to Ponce, very fresh and clean, very finernrnProvenance: The Don Gaspar Roca Collection (HR Harmer, 2006) (Image 1) (Image 2) (Image)

"CAGUAS." blue straight-line on folded letter dated "1de Octubr 1849" to Patillas with blue "ISLA DE PTO RICO 2 OCT 1849" on reverse, very fresh and clean, very fine (Image 1) (Image 2) (Image)

"CIALES" black straight-line with adjacent cds. "CIALES PUERTO-RICO 12 ABR 71" and double oval Municipal seal on official cover with manuscript "Vo Bo" at upper left to Arecibo with arrival mark on reverse, few small worm holes, fresh and fine (Image 1) (Image 2) (Image)

"MAYAQUEZ" red straight-line on small folded letter dated Septiembre 22 del 1844" to Ponce, very fresh and clean, very finernrnProvenance: The Don Gaspar Roca Collection (HR Harmer, 2006) (Image 1) (Image 2) (Image)

"Pt RICO FRANCO" black oval handstamp on folded letter to Barcelona, very fine and rare with only a few registered (Image 1) (Image 2) (Image)

"PUERTO RICO" red oval double framed handstamp on folded letter with red due marking "7.R." alongside, very fine and attractive (Image 1) (Image 2) (Image)

"SANGERMAN" and "SANGERMAN" with adjacent "FRANCO", blue straight-lines on two cover fronts, some toning and worm holes (Image 1) (Image 2) (Image)

1845/68(ca.), small group of five cover fronts with blue straight-lines "CAGUAS", "GIALES", "MAYAGUEZ" with adjacent "FRANCO" and boxed "GUAYAMA", toning, worm holes as usual (Image 1) (Image)

1850/63, interesting group of 7 larger sized coverfronts with different cancels incl. "SIN CARGO" blue "FRANCO", usual condition (toned, worm holes etc.)

1858/69, interesting group of 9 folded letters via Maritime mail to New York (6), Amsterdam (1), Edinburg (1) and London (1), 5 with forwarding agent cachets, some filiing folds, mostly good appearance (Image 1) (Image 2) (Image)

1861, folded letter dated "Aquadilla Setbre 4 de 1861" to New York with forwarding agent cachet "MICHELENA & Co. MAYAGUEZ" on reverse and handstamp "SHIP 5" and receiver "NEW HAVEN Con. OCT 17 1861" on front, vertical folds, otherwise finernrn  (Image 1) (Image 2) (Image)