Antique Scientific Equipment Laboratory Vacuum Pump Bell Jar Scientific Hobunkwan Auction Ending 12/22/14 http://yqz.me/HobunkwanEarly 1900’s, mahogany and brass single arm vacuum pump with a name plate for Hobunkwan, Osaka. It has a mahogany base board situated on mahogany feet. It has a turned column for the iron pump arm and a brass piston casing. A series of tubes feeds to a 8 1/2″ diameter brass plate with a frosted glass top. It has a hand-blown glass bell jar with lots of bubbles. There is a hook inside of the dome, also made of glass. It measures at approx. 29 1/2″ tall x 28 1/2″ long x 9 3/4 deep. This is a solid, heavy piece. There are places of wood rubbing, mahogany wood chipping, and wear on the metals and cast iron handle. Oxidation and signs of well use on the brass piston casing. The glass bell jar is in great condition. Please make sure to check all of our photos. Overall nice antiquated laboratory equipment. Happy Bidding.