This is not a Whitefriars, although Whitefriars did make a color glob with bubble weight in the 1970s. It came in two sizes, one bell-shaped with a neck and knob on the top and quite oversize - doorstop really. The other size eliminates the neck and knob. The inside design is an orange ball of glass with clearly defined rings of bubbles around it. The paperweight you have is Japanese from the 1970s through 1990s I would think.