A collection of old apothecary, chemists weights, ranging from 4 DRACHMS, 2, 1, 1/2, 2 SCRUPLES, 1, 1/2, and thin brass grains, some with bent corners, mostly stamped ER, one stamped GR, in uncleaned

 

Developed during WWII to test visual acquity for the military by the remarkable Dr. Isreal Dvorine, these color plates were painstakingly developed, tested and re-tested to accurately detect, classify

 

Alro 200R Very rare dutch circular slide rule ALRO 200R After 2 years I have started again to sell some of my slide rules and some other interesting things about calculating. I offer a very rare dutch

 

15 DIFFERENT LEE-NORSE INCLUDING BABY LN COAL MINING STICKERS GREAT CONDITION DISCOUNT SHIPPING WHEN YOU BUY MORE THAN 1 1-5 1.00 EACH ADDITIONAL AFTER THE FIRST 2.00 6-10 AUCTIONS WON .50 EACH ADDITI

 

up for auction is: A Graybar General Catalog No. 105 published in 1958. This Graybar catalog covers "Everything Electrical". This book is clean - no writing detected - one stray pen mark on first page

 

These clip on sunglasses from Lawrence & Mayo London come in their original, blue velvet lined, leather pouch (which does have slight dent, clearly visible in photo). I have no idea about age - to

 

Hope 740 custom circular slide rule made by Concise Co. of Japan and marketed under "Hope". This is an English-Metric converter, the front is a 3" pocket circular slide rule...attached to a rectangula

 

Attention collectors! We offer Russian Soviet rare medical award medals. These are awarded to the best doctors. Starting bid only 49$. Free shipping worldwide. No reserve price!!!

 

Swift Compensated Brass Anchor Barometer 5 3/4'' Tall x 1 1/2'' thick Swift, Boston Mass. with English Movement. Need slightly larger brass screws in back as they seem to be stripped.

 

Miniature Tesla Coil / Oudin Resonator Powered from a 3500V 8mA transformer (12) 690 PF Doorknob Caps for .00828 mfd Antique Self-Cooled Tungsten Spark Gap 1" copper ribbon primary coil 3 5/8" diamete