Hi Roy,
the vases are definitely Jobling and quite rare. The difference in height is probably just the result of them being treated differently, i.e. one has been flanged a little wider at the rim.
I have one of these vases (actually the example pictured on Glen's site, there is another pic here:
http://glassgallery.yobunny.org.uk/displayimage.php?pos=-770)
A similar shaped vase in flower pattern was also produced. I do not know how long they were made, I suspect it was for a very short time. The fir cone vase is featured in Jobling's advertisement in The Pottery Gazette, 1st September 1933, reproduced on p6 of Baker & Crowe. Neither vase appears in the 1934 catalogue, however.
There is only a brief mention in Baker & Crowe, pp12-13, describing how Jobling had received a 7 1/4 and 8 1/4 inch mould from France for the fircone & flower bowls, additionally mentioning that a vase and 5 1/2 dish in these patterns were also being designed from moulds produced in house (Baker & Crowe 1985 pp12-13).
These vases do seem a little mysterious; perhaps by 1934 Jobling decided to concentrate on its newer vases such as the bird & panel, butterfly & panel, etc. though this is largely speculation on my part.
All i can say is that in my opinion they are very beautiful vases and are definitely among my favourite Jobling pieces. If anyone has a photograph of a flower pattern vase by the way, I would be very interested to see it.
Steven
Reference: Baker, J & Crowe, K 1985
A Collector's Guide to Jobling 1930s Decorative Glass Tyne and Wear County Council Museums