Queen precision Kohlrausch slide E-2503 S Grey Instrument Co. / Philadelphia Pa. A type of potentiometer/ bridge, was used to make voltage measurements; somewhat slow, but you could make very fine rea

 

-Summer SaleNeed to sell - Listing Again at Reduced $ Original 18th/19th c Antique Brass Mortar & Pestle This fascinating relic of history is genuine and guaranteed old. It has survived the 200 +

 

This is an old Brass Pocket Compass in nice condition.

 

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About Us Our Shop Shipping A Good Watson Bactil Microscope Description: Offered is a very good Watson Bactil Microscope outfit. The microscope set is quite comprehensive and could easily be used as a

 

Battery Tester in working condition Very nice tester look like pocket watch in silver nickel case Great pocket watch for display ! No reserve ! Thanks for looking !

 

Offered here is a pay voucher from The Stratton Cripple Creek Mining Company for payment to The Cripple Creek Mine & Supply Company, Moys Hardware Company. Dated 1902. Great billhead graphic of a

 

We have up for auction at NO reserve 3 sets of pre 1900's dental forceps that were made by Cash & Sons, S.S. White and Marshall D.M. Co. ...I would say they are in nice condition considering their

 

RARE COLLECTIBLEIN ORIGINAL CASEEARLY PINCE-NEZ SPECTABLES STAMPED FITS UTHIS WAS A MAKERS MARK FOR THE AMERICAN OPTICAL COMPANY OF SOUTHBRIDGE, MASS.THIS BUSINESS WAS FOUNDED IN 1869 AND WAS THE OLDE

 

Circa 1890. French device invented by Stanislas Limousin in 1850 for masking the taste of bitter medicine powders. The device made rice flour shells (cachets) to hold the disagreeable tasting drug. Ca