There's no doubt that some moulds were sold, but there was certainly plenty of simple copying too. Brockwitz had a major mould shop and it's unlikely (not impossible) that they would have bought other moulds in; but who knows?! Brockwitz certainly sold moulds, a good example would be Rosen (Rose Garden) ones to Eda Glasbruk.
What is interesting about this particular piece is that it appears to be a stand alone item, rather than one of a whole range in a specific pattern. But that's not especially unusual for Brockwitz, as there are other individual "stand alones" as well.
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