From what I've read these are some kind of quackery that was produced to help piano students learn to play. It had a short run of production in 1888. Neither is complete, but there are enough part bet

 

GOATFREAK64 Store VINTAGE FREDERICK POST ENGINEERS SLIDE RULE 1447 P HEMMI W/ CASE 3 THIS IS A VERY NICE VINTAGE FREDERICK POST COMPANY ENGINEERS SLIDE RULE. MARKED NO 1447 P, FREDERICK POST COMPANY C

 

IN WONDERFUL CONDITION NOTE TO SHIPWEST COULD COST MORE

 

coyote4819 Store Up for bid is this brass carbide coal miners lamp. The top lever moves back and forth. The bottom states Universal Lamp C.O. Springfield,ILL. Made in U.S.A. Considering it's age this

 

Vintage 'The Scaleometer' small optical measuring device, has a scale within the lense? Possibly Silver?

 

Beautiful Vintage Handmade Blue/Silver Metal Marble Kaleidoscope 12" long, 1 1/2 dia. Marble slides in and out and can be changed out to what other 1.25 dia. marbles you may have :) Selling some of my

 

You are bidding on a used and fully functional MF-3000 melting furnace. We used this for a total of 4.5 hours between 6 different sessions. Both crucibles have been used for silver. This kit includes:

 

its all there may have been used ,instructions bug holes ,box taped together

 

FRANKLIN MINT BRASS ASTRONOMICAL ASTROLABE 1987 Rarely seen for sale on e-bay, the last two I could find were in the U.S.A! Excellent condition, all parts moving smoothly. 　 OFFICIAL ISSUE OF THE NA

 

NKUrban Prospecting drop riffle sluice boxes are made from ABS plastic to belight, durable, and very effecting at trapping gold! Unlike classic Hungarianriffles, drop riffles don’t throw the fine go