Working Model of Stephenson's STEAM ENGINE made of GLASS ! Rare!Highlights: * The crankshaft is glass. The piston is glass. The counterweight that makes the wheel spin evenly is glass. Imagine that everything is made out of glass. * There are no sealants used. All is accomplished by a perfectly snug fit. The gap between the piston and its compartment is so small, that the water that condensates from the steam seals it shut! * Notice the elaborate e
