see the attached copy of National Archive image showing the lower part of this design and which matches Margaret's piece, and which was allocated Registration No. 782110.
I had already presumed there would be two separate Registrations for this design .... one for Margaret's lower part with the arching legs and another for the upper bowl.
Unfortunately, the Archives at Kew are missing the drawing for the bowl and, coincidentally, are missing an image for 782109 - which I'm assuming would be the design for the bowl. I've commented on this missing image to the people at Kew, but suspect the page has been missing for a long time and regret there's nothing we can do about it now.
Those folk who have the Blue Book will notice that it omits any reference to 782109, so assume the drawing for this part of the design was missing certainly when the Blue Book was compiled. The Blue Book was intended as a brief but important contribution to post Jenny Thompson's publication, and not as a detailed overview of Registration Nos. - which would account for the absence of relevant comments as to wrong CLASSES, and/or missing Nos. etc.