Have a few, either in a newer cardboard tubes or in telescoping turned hardwood tubes. The cardboard boxed ones are in those containers only because the wood tube boxes disintegrated over time. These came from a NYC ship chandler who in turn bought them at a surplus auction at the New York Navy Yard, I’m guessing in 1950’s. Patent for the Tagliabue Hysrometer is Online. The salinometer is a particular type of that hydrometer, weighted and calibrated for sea water at a certain temperature. I also have some tall thin brass beakers in which the salinometers were used. https://patents.google.com/patent/US58913 I’m not sure how best to market these, think I tried long ago on Eboo with little success.
