Carol, Glasform is the name of the glassworks run by John Ditchfield. It was started in 1982, and to begin with, every piece was signed and numbered. Then these paperweights with silver things on started fetching big prices on collectables programs on tv, so production of them increased.
Carol and Gareth, I think since Glasform went mad making paperweights with silver things on, John Ditchfield stopped signing and numbering each piece individually.