the oil bottle you have were used in the 30s 40s. Oil would be pumped in from a bulk tank to a mark in the glass,near the tiop by the metal screw top, then poured into car, truck, what ever. One US quart. The markings are approval by weights and measures by that particulare state. I have several in my collection. I am currently a certified weight and measures for Illinois, and have serviced gas pumps for 22 years.