• katie_delano The marked imitation cut glass may have one of these
    Art Cut...........U S Glass
    DeepCut........Westmoreland
    Nearcut..........Cambridge
    NuCut.............Imperial
    NuArt..............Imperial
    Prescut..........McKee
    PlungerCut....Heisey

    Often on the inside bottom of a bowl shaped item.

    (Thanks Dori)