Wow, thank you!
I googled Gilbert & Barker and found this site from the Smithsonians National Museum of American History
This Gilbert & Barker Model T-6 is one of the first gasoline pumps that counted the number of gallons pumped. In 1865, Charles Gilbert and John Barker formed a company to manufacture a "gas machine" that vaporized petroleum distillates for lighting systems. Gilbert & Barker later manufactured oil burners for industrial furnaces, and in 1910 the company added hand-operated gasoline pumps to its product line
https://americanhistory.si.edu/collections/search/object/nmah_1326341
