It's rather sad to be clicking to links on my own website but the reason for the Richardsons comment was a similar pressed design on p337 of Hajdamach's "British Glass 1800-1914" - the usual problem of not knowing how many manufacturers may have made similar or identical patterns.
In this case though the eBay object looks exactly like the Molineaux Webb image and some way distant from the Richardsons item I was referring to. You might have spotted a rare early piece there, I would expect it to be heavy if from that time period.
While we're talking Molineaux Webb, just one random factoid for you all. A few years ago I photographed the gravestones of the Molineaux, Webb, Ellis, Percival families in Manchester General Cemetery. They had a prominent place in the grounds. Found out last week that Molineaux, Webb, Ellis families were all shareholders in the cemetery when it opened in 1836. They were already involved heavily in the railway share mania active around this time. So they were all making a good deal of money in the 1830s to be throwing it around like that, even to the point of getting a good grave plot as a shareholder perk!