Probably the least known and most cost-effective international shipping service is the United States Post Office's "M-Bag" service. An "M-Bag" is defined as a "direct sack of printed matter to one addressee". Your packed books, in one or more boxes, are literally enclosed in a special postal mailbag, a tag is affixed to the outside of the bag, and it is delivered to your customer. In addition to books, M-bags can also be used for a variety of printed matter, including newspapers, magazines, journals, books, sheet music, catalogues, directories, commercial advertising, and promotional matter (You cannot enclose handwritten or typed materials.)
Born in the post-World War II era to move huge amounts of books and other materials to Europe, M-bags are now cost-effective vehicles for shipping to countries all over the world. We frequently use M-bag service which costs, for example, $9.90 to the United Kingdom or $11.00 to Hong Kong for up to 11 lbs. There is no minimum weight for M-bags, but for weights up to 4 lbs. regular surface mail, or Global Priority flat-rate envelopes can be more cost-effective, or even faster. Larger quantities up to 64 lbs. are also value-priced.
M-bags can be shipped either via surface mail or via air mail, and must be accompanied with a completed customs form PS 2976 and an M-bag tag, PS Tag 158. The customs slip and the return address/customer address go on the package. The M-bag tag also has a return address/customer address, and on the reverse of the tag the postage is adhered. NB: The postage does NOT go on the package but on the tag.
Weigh your parcel and then round up to the nearest pound to compute postage. For example, if your parcel weighs 11.2 lbs, you will be paying the 12-lb. rate. The total that the M-bag can weigh is 66 lbs. (including the tare weight of the sack), so figure 64 lbs., maximum, for your parcel or group of parcels addressed to the same person, per sack. There are no defined size limits for the size of the box, as long as it fits inside the sack. If you are using an extra-large box, it would be wise to check it out at your local post office first before filling it. We have shipped all the common sizes of post office boxes, including 13"x13"x13" boxes, and they fit fine. The sack is quite large.
It is your responsibility to attach and label everything correctly. The M-bag tag, PS Tag 158, is filled in by the bookseller, but attached to the sack by the post office. If you are sending more than one M-bag at a time, it is critical to make sure that the right tag goes with the right package. Don't hand in the tag loose - lightly tape each tag to the package it belongs to before passing it over. (Just try and get back packages which the post office has sent to the wrong customer in places like China and South Africa.)
Swann Maps & Atlases, Natural History & Color Plate Books December 9, 2025
Swann, Dec. 9: Lot 156: Cornelis de Jode, Americae pars Borealis, double-page engraved map of North America, Antwerp, 1593.
Swann, Dec. 9: Lot 206: John and Alexander Walker, Map of the United States, London and Liverpool, 1827.
Swann, Dec. 9: Lot 223: Abraham Ortelius, Typus Orbis Terrarum, hand-colored double-page engraved world map, Antwerp, 1575.
Swann Maps & Atlases, Natural History & Color Plate Books December 9, 2025
Swann, Dec. 9: Lot 233: Aaron Arrowsmith, Chart of the World, oversize engraved map on 8 sheets, London, 1790 (circa 1800).
Swann, Dec. 9: Lot 239: Fielding Lucas, A General Atlas, 81 engraved maps and diagrams, Baltimore, 1823.
Swann, Dec. 9: Lot 240: Anthony Finley, A New American Atlas, 15 maps engraved by james hamilton young on 14 double-page sheets, Philadelphia, 1826.
Swann Maps & Atlases, Natural History & Color Plate Books December 9, 2025
Swann, Dec. 9: Lot 263: John Bachmann, Panorama of the Seat of War, portfolio of 4 double-page chromolithographed panoramic maps, New York, 1861.
Swann, Dec. 9: Lot 265: Sebastian Münster, Cosmographei, Basel: Sebastian Henricpetri, 1558.
Swann, Dec. 9: Lot 271: Abraham Ortelius, Epitome Theatri Orteliani, Antwerp: Johann Baptist Vrients, 1601.
Swann Maps & Atlases, Natural History & Color Plate Books December 9, 2025
Swann, Dec. 9: Lot 283: Joris van Spilbergen, Speculum Orientalis Occidentalisque Indiae, Leiden: Nicolaus van Geelkercken for Jodocus Hondius, 1619.
Swann, Dec. 9: Lot 285: Levinus Hulsius, Achtzehender Theil der Newen Welt, 14 engraved folding maps, Frankfurt: Johann Frederick Weiss, 1623.
Swann, Dec. 9: Lot 341: John James Audubon, Carolina Parrot, Plate 26, London, 1827.
Sotheby’s Book Week December 9-17, 2025
Sotheby’s, Dec. 11: Darwin and Wallace. On the Tendency of Species to form Varieties..., [in:] Journal of the Proceedings of the Linnean Society, Vol. III, No. 9., 1858, Darwin announces the theory of natural selection. £100,000 to £150,000.
Sotheby’s, Dec. 11: J.K. Rowling. Harry Potter and the Philosopher's Stone, 1997, first edition, hardback issue, inscribed by the author pre-publication. £100,000 to £150,000.
Sotheby’s, Dec. 11: Wolfgang Amadeus Mozart. Autograph sketchleaf including a probable draft for the E flat Piano Quartet, K.493, 1786. £150,000 to £200,000.
Sotheby’s, Dec. 12: Hooke, Robert. Micrographia: or some Physiological Descriptions of Minute Bodies made by Magnifying Glasses. London: James Allestry for the Royal Society, 1667. $12,000 to $15,000.
Sotheby’s, Dec. 12: Chappuzeau, Samuel. The history of jewels, first edition in English. London: T.N. for Hobart Kemp, 1671. $12,000 to $18,000.
Sotheby’s, Dec. 12: Sowerby, James. Exotic Mineralogy, containing his most realistic mineral depictions, London: Benjamin Meredith, 1811, Arding and Merrett, 1817. $5,000 to $7,000.
![<b>Sotheby’s, Dec. 11:</b> Darwin and Wallace. On the Tendency of Species to form Varieties..., [in:] <i>Journal of the Proceedings of the Linnean Society,</i> Vol. III, No. 9., 1858, Darwin announces the theory of natural selection. £100,000 to £150,000.](https://ae-files.s3.amazonaws.com/AdvertisementPhotos/00d5fd41-2542-4a80-b119-4886d4b9925f.png "<b>Sotheby’s, Dec. 11:</b> Darwin and Wallace. On the Tendency of Species to form Varieties..., [in:] <i>Journal of the Proceedings of the Linnean Society,</i> Vol. III, No. 9., 1858, Darwin announces the theory of natural selection. £100,000 to £150,000.")
