Chris, back in 2012, I posted some pics of a celery with the same surface 'fleur de lys' pattern, but I haven't seen a pedestal dish in this pattern before. See:http://www.glassmessages.com/index.php/topic,48236.msg276088.html#msg276088
That celery (and several other examples of it that I have come across since) had a peculiar lozenge (2 - V - X - ?) which, at the time, I though was for 2 February 1876 - Parcel 1. Now, of course, I know that this is one of those peculiar 'anomolous' or 'nonsensical' or 'peculiar' lozenges that crop up from time to time (because they don't have the correct sequence of digits and letters that a 'proper' registry date lozenge would possess).
I show a pedestal sugar/comport with the anomolous lozenge O-X-A-Y, but bearing a clear Henry Greener 1875-1885 demi-lion trademark.
Roy showed a 2-handled 'wine cooler' with a tree bark design and another 'peculiar lozenge (T? - X- X - 9) at http://www.glassmessages.com/index.php/topic,53870.msg305604.html#msg305604
and the T? or sideways 'Y' is under the Class III ring seems suspiciously similar to that on your indistinct lozenge.
There has also been a thread athttp://www.glassmessages.com/index.php/topic,50579.msg286077.html#msg286077
where Henry Greener is very lax with his use of lozenges, using the same lozenge on two completely different designs. In a similar vein, I also have some photos (yet to post) of a Henry Greener 'fans and roundels' dish bearing the lozenge for RD 322393 of 8 June 1878 which is, in fact, the lozenge normally found on a completely different Henry Greener design.
So now, whenever I come across a piece of glassware with a nonsensical registry date lozenge (especially if it has a superfluity of 'X's), my first impression is that the most likely culprit for its provenance is Henry Greener from somewhere between the late 1860s and 1885. That first impression may, of course, be quite wrong, but the pattern on my 'fleur de lys' celery and your 'fleur de lys' pedestal dish-cum-sugar is very similar indeed to the style and manner of design and quality of manufacture of quite a few of the early Henry Greener design registrations from the late 1860s right through into the late 1870s and even the early 1880s. (Perhaps, by then, the errant 'lozenge allocator' or dyslexic mould maker had been given his/their P45).