Photograph of lubricator and can of lubricant, Southern California, 1931. "New visible type, Automatic, Jay Lubricator, for top cylinder lubrication, patent use only no. 1753718, Jay Lubricant, Jay MFG Co[mpany], 825 E Seventh St[reet], Los Angeles Calif[ornia]" -- on container. "Jay Lubricant, for top cylinder lubrication, manufactured specially to lubricate valves, seats, [ilg], cylinder walls and top piston rings of all types of g[ilg], rings of sleeve valve motors. [ilg] and prevents sticky valves and hard carbn. Ideal [ilg]. Positively will not gym valves or foul plugs. Compounded by builders of Jay Lubricator, for top cylinder lubrication, Price 50 cents, Jay Manufacturing Co[mpany]" -- on can.