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Items for sale followed by sold items:

— 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 — — One of only two known DUPLEX / Babcock Pencil Sharpeners patented in 1900. Sold! —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! — Only three other Sargent & Greenleaf Safe Time Looks like this are known to have survived! 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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— Earliest Known, and one of a kind, Martian Big 4 Crystal Radio. Sold!

Swiss citizen Charles Louis Marti applied for a patent on December 1st, 1922. It took more than a year till his application for his patent was granted on April 29, 1924. The number of the patent is 1,492,080.

Several companies manufactured crystal sets utilizing Marti’s patent and sold the set under the names Martian Big 4 and Saturn.
Until the discovery of the crystal set or radio offered here, all crystal sets or radios sold with the name Martian Big 4 had a tripod base. The radio offered here is the only one discovered with a round base, and is the first version of the Martian Big 4 crystal set.

Erich E. Brueschke, the expert on Martian radios, studied the subject and wrote an extensive report on the different versions of the Martian Big 4. In his report Brueschke differentiated between seven models - some with captive lever binding posts, others with knurled binding posts and additional differences. He also describes a version with pot metal tripod legs instead of Nickel plated brass legs.

The discovery of the set offered here may necessitate a rethinking of the time line presented by Brueschke, who is undoubtedly the expert on Martian crystal sets. Read more>>


Posted on 10 Apr 2023, 15:03 - Category: Wireless
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