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Items for sale followed by sold items:

— One of only two known DUPLEX / Babcock Pencil Sharpeners patented in 1900. Price $5,800. — Only three other Sargent & Greenleaf Safe Time Looks like this are known to have survived! Price $2,870. — One of five extant Baldwin Arithmometers from 1874. Price $9,400.00. — Exceedingly Rare Eberhard Faber International Letter Scale. Price $2,450. — The Only Extant Antique Harrison Sewing Machine, Patented in 1859. Price $5,450. —Jordan L. Mott pyramid stove from 1835. Price $1,750. —First Telephone, the Coffin Set manufct. by Charles Williams, Boston, Massachusetts, USA, for the National Bell Telephone Co. of 1878. Price $9,950. —Early, unknown Watson Sewing Machine. Price $6.250. —The only known extant EVEREADY Lady Liberty, or Statue of Liberty Novelty Light ever to be found! Price $6.800. — Legendary ALTEC LANSING 604 Duplex Speaker With Original ALTEC Enclosure. Price $4,350. —W. Younger 1847 Washing Machine Patent Model —Exceedingly rare and fine quadruple Clepsammia or Hourglass, probably the finest extant example from the 17th century in the world. Price $16,200. —Exceedingly rare and very ornate early battery Novelty Light, the only one known of its kind! Price $1,450. — Rare Bryant’s Celestial Indicator, pat. Sept. 10, 1872. Price $8,750.00 —The Adding Machine of Pierre Fardoil c. 1700. Price $73,500. — Rare Antique Deep Sea Diver´s Boots or Shoes. Price $650. — SOLD ITEMS ... SOLD ITEMS ... SOLD ITEMS ... SOLD ITEMS — —Exceedingly rare and important Singer 1856 Turtle-Back Sewing Machine; one of eight machines extant. Sold! — One of only three known extant Frank S. Baldwin Calculators Patented in 1902. Sold! — Seeley’s Portable X-Ray Machine From 1915. Sold! — Exceedingly Rare 1904 Oscar Hedstrom Motor, First Motor to Power an Indian Motorcycle. Sold! — Exceedingly rare Pocket Battery No.1. Sold! — Earliest Known, and one of a kind, Martian Big 4 Crystal Radio. Sold! — Only Known First-Model-of Williams Can-Opener. Sold! — Only Known Surveying Instrument Signed J.MORSE (18th Century). Sold! — The only known sewing machine based on Cook´s Patent of 1863. Sold! — Early, ca 1820, James Watt Model Steam Engine. Sold! — Charles Page Reciprocating Electro-Magnetic Engine of 1838. Sold! — Rare Illuminated Pathe Westminster Cone Speaker & Radio. Sold! — Walker’s Pocket Camera; The First Pocket Camera. Sold! —The finest figural Sewing Machine; the “Lady” or “Cora Munro” Sold! — Charles Lane Poor Line of Position Computer. Sold! —Very Early Leclanche Battery Sold! —The only Sextuple Safe-Time-Lock extant. Sold! —Earliest known Blow Accordion with 10 keys. Sold! — Rare, KEY to the AIR, Radio outfit. Sold! — Sargent & Greenleaf model 4 Safe Time Lock of 1878. Sold! —The only known extant Spencer Electric Co., Potbelly Candlestick Telephone (serial no. 32!) Sold! —Peerless Whittler Pencil Sharpener, with three rotating knifes. Sold! —Rare, and in fine condition, H. H. Scott model LK-150 Stereo HiFi Vacuum Tube Power Amplifier in perfect working order. Sold! —Early version (serial # 160!) of the 1921 three bank Noiseless Portable Typewriter in very good condition. Sold!

Endorsed Websites

— Antique Telephone Collectors Association — Collection of Historical Scientific Instruments Harvard University — Massachusetts Institute For Technology — Smithsonian Institution — Technogallery a Museum of Science & Invention where the Exhibits Are For Sale

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— One of only two known DUPLEX / Babcock Pencil Sharpeners patented in 1900. Price $5,800.

Early pencil sharpeners were invented with many different mechanisms which makes them interesting to collect; some of them were successful as the price was right and they functioned well, some did not.

The DUPLEX pencil sharpener invented by Charles Babcock and patented on October 2, 1900, was definitely destined to fail.
While it is not known to me what the price of a DUPLEX was, it is clear that Babcock’s DUPLEX pencil sharpener was awkward, if not impossible, to operate with only two hands!

The instructions of the DUPLEX actually do not even suggests to tighten the chuck while sharpening the pencil, as the two hands of the operator are busy cranking the handle to turn the six knifes and holding the pencil sharpener with the other while pushing a rod to feed the pencil to the knifes!

The insert holding the six rotating knifes was made of pot-metal, which was a novelty casting technology at the time, of which was little know how durable it would be. The only other DUPLEX is already missing one of the six knifes and the entire pot-metal insert is falling apart, read more>>


Posted on 10 Aug 2024, 12:44 - Category: Office, Banking
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