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

 

Check out my other items! (Click on the symbol to see the other kaleidscopes in my store!) Award-winning design, one-of-a-kind, stained glass kaleidoscope, signed by artist. Completely handcrafted by

 

Nice older German drafting set in very good condition. Leather case also very good. Please look at pictures carefully and email any questions before bidding as all sales are final. Thanks for looking

 

Antique Bone Engineering Sector Folding Rule, Brass Round Hinge, Intricate, Nice Click to Enlarge Click to Enlarge Click to Enlarge Click to Enlarge Click to Enlarge Click to Enlarge This is a very el

 

musicreddog_0 store Elegant 19thC Antique Faux Tortoiseshell Long Handled Single Folding Lorgnette

 

Plastic slide rule concrete calculator from The Brewer Co. Cincinnati, Ohio. Shows normal wear, but all printing on both sides is very legible. It is 7" long. An interesting advertising or contractor-

 

VINTAGE Professional Scientific Massage Modality Model M-1 Made in USA by John Oster Manufacturing Co. Milwaukee Wisconsin Works great and is in nice condition for its age. Comes with original box and

 

OFFERING 15 VINTAGE DENTAL IMPRESSION TRAYS, A RUBBER MIXING BOWL AND SPATULA. ESTATE SALE. ASSORTED SIZES. MAKERS INCLUDE; CAULK, DIXON AND BUNCE KANOUSE TECHNIQUE. MATERIALS INCLUDE; ALUMINUM, STEEL

 

Up for auction, A Vintage, Heavy, Brass, Western Germany, Desk Top, Weather Station, Thermometer, Barometer, And Hygrometer. Measuring 8¼ inches long, 3½ inches tall, with a 1⅜ inch, wide base. Th

 

These are metal pens that look just like a syringe. Very heavy and unusual. One of a kind! They are new, never been used but there is some cosmetic damage to each one which is why they're being sold f