Christine — I disagree. Here in the UK, generally only Sowerby's "as-moulded" vases, i.e. celery vase or toothpick holder shape, were sold either on their own or with both flower holder and plinth as standard.
T-ed and other reshaped vases were sold with both fittings as standard. This also seems to have been the case in the Empire/Commonwealth. I don't know what was standard for Sowerby's exports to mainland Europe where plinths were less frequently used.
You will notice my "as standard" qualification. The only rule was to sell and make a profit. Trade buyers with major spending power could specify any combination they wanted, but I don't believe nonstandard configurations were that common.
Note one oddity. Bagley 1+2 clock garnitures were not issued with flower holders as standard, according to their PG ads. So a Bagley clock garniture with flower holders offered now is likely to be the inspiration of a creative mix-and-match dealer.
Bernard C.
