m, to be honest I haven't gone into that, I assumed that Egerman manufactured all the pieces attributed to them but, having had a quick look, it appears Egerman decorated pieces made by other factories. I'll have to investigate further. One thing I did wonder about was, considering the thickness of the glass, whether it was mould blown using compressed air rather than by mouth. I know Baccarat were using that method then but whether it was used elsewhere I don't know.