Yes ive got the Silber book but it mainly deals with high Victoriana, for the middle classes nothing really on everyday bits of glass, and so much has been produced in back gardens over the years. I saw today a modern pint glass, i wish i would have picked it, i will if it's still in a local Church charity shop with beautiful barley and hops wheel engraved design not so dissimilar to Georgian glass, having only a fiver and no wallet having just finished work i picked up these two tankards instead, one i think is an 1980's piece of Stuart crystal and the other is 1850's must be a piece of local Stourbridge glass, has seeds, wear around the rims excluding the handle a lovely ring and deep polished pontil, i thought how similar they were sat next to each other so i picked them up instead. I do need to pick one thing and get rid of the rest but i just love the stuff.