A Collection of Circular Slide Rules and Calculators. See photos for what is included. All are in very good condition except the Range Computer which has 3 internal cracks in the back plastic disk. So

 

This is for an unusual vintage metal pencil sharpener with a built in compass. The sharpener is elongated to house the compass at the end and the compass has a glass top and blue steeled pointers. It

 

Vintage Post-War 1970's T.K. Japan Binoculars with Case-binoculars read on one side: Albert, coated lenses, triple tested-binoculars read on the other side: 7x50, Field 7.1, No. 910865-binoculars are

 

This is a fairly large pair of Binoculars made under contract for the US Navy by the National Instrument Corp. of Houston during World War Two. This is their Mark 32, Mod. 1, and includes the original

 

Perry~Hall Antiques About UsVisit Our Other Items for SaleAdd to Favorite Sellers Optical Ornate Silver Handled Magnifying Glass Fully Hallmarked Sheffield 1990 Description For sale we have this ornat

 

Highly unusual and rare 1966 Keuffel & Esser vintage ANALON ENGINEERING-SCIENCE ANALYSIS SLIDE RULE - with case and Instruction Manual. One of the rarest of K&E slide rules and one that utiliz

 

Nice vintage chrome Welch Allyn otoscope with pivoting magnifier. It has a new bulb in it and one spare is included. The plug-in AC Burton Cavitron power controller gives you any level of illumination

 

beautiful brass 4 1/2" precision navigation instrument yaw control indicator- level. large ship control panel instrument. made by kelvin bottomly & baird ltd. of glasgow-london-basingstoke. they s

 

Here is a very, VERY nice vintage and original true double marked Ernst Leitz Wetzlar microscope, in it's original carrying case! Leitz Magnification lenses: Leitz Pariplan 10x & 6,3x B, 3,5: 1A 0

 

Vintage Bausch & Lomb Microscope--very heavy and old. I will try to answer any questions you have, but I don't know much about microscopes. Please ask questions before bidding. From smoke-free hom