DESCRIPTION This is a vintage knife switch mounted on a large piece of slate. The slate base measures about 7" X 6.5" and weighs nearly four pounds. The three copper "knives" are connected to a common
Only 3" long this kaleidoscope is made of brass and fits cleanly in pocket or purse. It is constructed differently than typical kaleidoscopes. It doesn't tumble colored glass fragments in a compartmen
Classic Keuffel & Esser Log Duplex DeciTrig slide rule. The latest patent dates from 1940, and Mr. Lundin was already a graduate student in Chicago by 1950, so the timeline for dating this is pret
Vintage Keuffel & Esser Co. slide rule dated 1947. It comes in the original case and also includes the instruction manual dated 1936 Powered by eBay Turbo Lister The free listing tool. List your i
PLEASED TO OFFER A LOT OF (4) VINTAGE MECHANICAL DRAWING AND ENGINEERING BOOKS. THEY BELONGED IN MY FAMILY AND NOW TIS TIME FOR ANOTHER TO ENJOY THEM... BOOKS ARE IN GOOD SHAPE WITH NORMAL AGE WEAR ET
Corki Weeks Brass Swirl KALEIDOSCOPE Very nice brass kaleidoscope made by California artist Corki Weeks in the 1980s i believe. It has very nice brass exterior case and a beautiful continually changin
Item: Vintage JOHN HENSCHEL Quick Change Precision Aluminum Pantograph w Instructions Condition: All items are considered used and sold "As Is", there are no guarantees. You get what is pictured. Plea