Dioes this refer to the "prism drops" applied to such as vases and candle holders, or to the whole thing? The term "lustre" can mean either, depending on which reference source is used.
Even with older lustres the drops were often bought in from other works, which makes ID more of problem if we try to accurately attribute all the parts rather than just the vase / candle holder part, or the drops alone!!
On the other hand, do we really care where the drops were made if the interest is only in the ultimate production of the whole thing, particularly if the whole is a chandelier!!??
Sorry to add some pedantic confusion here.
