Hello Tony, and thanks for your interest and comments

- although the answer, regrettably, is that mine are most definitely not the same pattern as Davidson 254027. I do appreciate that it is not easy to see the surface clearly on these vases, but in fact the 'diamond' pattern on them is elongated, and comes to a quite sharp projection, unlike the milk jug which certainly appears to have flatter diamonds. I think I am possibly correct in saying that, outside of this yellow pearline, Davidson did not produce very much glass with a U. content and, as you say, most of thier production from that period does carry a Rd. No. - and despite running my fingers around these vases umpteen times, I can say quite safely that they are minus any sort of No. I am now an expert at finding Rg. Nos. and Rg. Diamonds on glass - having failed miserably in the past, and had to ask for help - they can often be amazingly difficult to locate, and even a large diamond impression with its letters and Nos. - on clear glass - can elude the most careful eye - that is not a GMB eye of course :24: