A "Knowlton Vacuum(star) fruit jar" in the scarce half gallon size. Complete, original and in excellent condition with only the common slight roughness on the lip. Zinc lid and glass cap both are correct---dated May 1903. This one is a ice blue color. It was made from 1903-1908 by the Mansfield Glass Works in Lockport, NY. The owner was Dallas Knowlton of Washington, DC.