This is an old time hearing aid system that was made by Sonotone. It comes in a very small carry case that once contained a battery. Included is a microphone unit that mounts inside the case and speak

 

Please check out my seller's list for more items! DESCRIPTION:You are bidding on a Sept 14, 1908 two page letter written on letterhead from Dr. H. Sanche & Co - Manufacturers of OXYDONOR and All D

 

Original colorless glass Dakota candy or apothecary jar ground lid. Measures 3-9/16" across the bottom which flares to approx. 3-7/8" diameter where the lid would sit flush with the neck of the jar. C

 

c.19th EDMUND WHEELER MICROSCOPE SLIDE,  Test object in balsam Beautiful microscope slide by Edmund Wheeler.   Tracked shipping to EU is 4 GBP. Worldwide is 6 GBP. I'll combine postage for multiple

 

Nicely crafted instrument in its original hardwood case with calibration certifications from 1907 and 1925, the 1907 at "Lynn Laboratory" by General Electric. The meter movement is free and the overal

 

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2 nickel boxes containing dentists tools & a syringe & needles. Dont know history but think would date from early - mid last century. Generally good condition.

 

What a rare and beautiful item. It has been estimated to be from the 1880-1900 ERA. I do not know that for positive, but the writing on the front of this item does show a lot of age. Actually the writ

 

This is a Civil War era pocket, cased barometer. The brass hinged case is built like a CW period leather covered tintype case. The closing button does not work and that is the only thing that keeps th

 

A WIMSHURST-TYPE ELECTROSTATIC INDUCTION MACHINE, GERMAN, CIRCA 1900 unsigned, with enamelled base plate, steel fittings, Leyden jars, contra-rotating Bakelite discs with brushes, moveable electric co