The Saybolt Standard Universal Viscosimeter Antique .

Information is limited unfortunately...Used to test the viscosity of oil in the early 20th century.. The only other example of one I came across was at the Smithsonian Museum Of American History which was dated to around 1915...Fantastic condition for being how old it is. Just a little bit of a unnoticeable depression around the rim which adds to the charm . If you have any other info feel free to email with knowledge...Thank You good luck