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Hi. Thanks for the extra images. I would not be confident attributing this to Paul Ysart, rather than to a Belgian factory. There are quite a lot of these badge weights around, and they vary in glass quality, frit style, and shape. There are threads on this board discussing them - search for 'badge paperweight' and you will find several discussions. Regarding value, I bought one a couple of months ago for £38.00, so to repeat what I said on your earlier thread, I am surprised Bonham's would consider a low value piece like this - here in the UK Bonhams usually look for a minimum estimate of £400 to £600, whereas this would probably make only 10% to 15% of that.
Alan