The PDS Drawing System is a unique drawing instrument that combines the basic elements of drafting into a single tool. Integrated into each of the tools is a combination of scales, 90 degree and 45 de

 

Brand new in the box

 

Antique Mother of Pearl opera glasses, The binoculars are marked: LEMAIRE FI PARIS. Beautiful nice colorful iridescence in the Mother of Pearl. The top is marked: with a fly and they where made in Fra

 

THE ITEM WITH THE PENCIL IN IT IS MARKED DIETZGEN W. GERMANY. IT MEASURES APPROX. 7" LONG. THE ONE WITHOUT THE PENCIL IS ALSO MARKED DIETZGEN. THEY SEEM TO BE IN GOOD WORKING CONDITION. THE NEXT ITEM

 

A Facit mechanical calculator from my collection. A bit dirty from sitting on a shelf, but complete and fully functional. Needs a good cleaning. S/N 155673, imported and sold in London by Block and An

 

Slide Description: This is a very good Injected Section of Human Bladder by E. Wheeler in superb original condition. Slide Condition: Excellent specimen Over the next few weeks of May we will be selli

 

Vintage German Slide Rule FABER CASTELL DUPLEX 2/82 Sliderule - 13" - Light use wear - Overall Good Condition Thanks and Good LUCK!! PLEASE NOTE: Shipping & handling is always disclosed in the auc

 

Vintage ATCO Barometer Great vintage ATCO barometer. Wood case with brass colored spokes. Marked on back Germany. In very good condition. Some normal wear to spokes but all are intact. None missing. G

 

rowingboat2012 Store STUNNING ANTIQUE VICTORIAN COW BONE RULER W H HARLING LONDON

 

Stannous chloride is a white, crystalline solid having a density of 3.95 and a melting point of 247 degrees Celsius. Soluble in water and alkalines. It's uses include - ceramics, sensitizing agent for