I was surprised to see the Kew image for this item in David's link (Ivo also showed the same pic back in 2010) - as far as I know none of the glass (Class III) items can be viewed down at individual item level, on the screen. Can only assume that Earthenware (Class IV) works differently to glass.

For some reason, I don't seem to have a picture of 183953 taken from the Kew Representations Book BT 43/61 - which covers Class III, glass items - April 1852 to Sept. 1870.
However, I do have pictures taken from the corresponding Register (the words part only) which is Kew ref. BT 44/7 (this covers Class III items only) and is a single volume running from 1842 to 1882 - between these two dates the Board of Trade obviously wanted to keep the various materials separate, and so the individual volumes each contain one Class only.
After this I think the Board of Trade included ALL Registrations for ALL Classes (numbered consecutively) in books - thus you find reams of wallpaper and printed fabric designs together with glass, wood and metal etc. in the same Register - although I believe there are exceptions, and textiles and sculptures are on their own.
Sometimes when I watermark there is a loss of sharpness to the original image, which is a shame, as these two attached pix started out life with amazing clarity - I don't think it happens every time though.
I don't think the attached pix add anything new, but thought they'd be of interest for the sake of completeness - hope the wording can be read.
The very fact that these pix are taken from Kew volume ref. BT 44/7, confirms the fact that this design was included in Class III glass, and you can see from the left hand column the wording 'Classes I & IV also' - an obvious attempt at cross-referencing.
Quite what the word 'jar' implies I'm not sure.
I shall be at Kew in the coming week or so, and if possible will take a snap of the drawing in the Representation book BT 43/61 (glass only), for comparison with the images we already have of this Rd.
David - am sure Patricia (see, I got it right that time

) is an expert at researching archives, and assume she is aware that, for Kew, a readers ticket is essential in order to access the archives and take pix etc. - the procedure for obtaining a ticket can take some little while, from memory.
P.S. the above probably sounds confusing - and probably is if you don't have experience of The National Archive methods and archives. It's well worth going onto their web site and having a look at the various sections for Board of Trade Registrations for the C19, and should help to flesh out some of the terminology and might help to make more sense of some of these Rd. Nos. wot we speek about.