Coffee cup, Bow East London, c. 1745, height 60 mm (private collection). This press-moulded coffee cup has a decagonal footrim, fluting, and a plain loop handle. The body has a high P2O5 content (24.3 wt%) and a prominent lead glaze (53 wt% PbO). One of the major arguments voiced against our work relating the A-mark group of porcelains to the Bow manufactory can be traced back nearly half a century to Charleston and Mallet (1971) when they wrote in connection to the A-mark group of porcelains;
....bears no resemblance whatever, in shapes, details of potting, or enamelling to the later Bow wares.
Out of this has grown the mantra;
Anywhere but Bow and anyone but Heylyn and Frye.
So influential has this claim by Charleston and Mallet been that the following quote influenced by these two authors appeared in the literature in 2015;
No single model associated with the 'A'-mark class corresponds to its presumed heir apparent, a surprising anomaly.
We beg to disagree.
The above coffee cup in our opinion is the "missing link" in English porcelain studies. It has a distinct A-mark shape but has a Bow Defoe-New Canton period phosphatic composition, which has been recognised by us as stretching from 1744-1755.