Hi there,
this type of vase definitely not Fenton, but sorry I cannot identify the exact manufacturer at this stage.
My personal opinion is that these particular vases are of a relatively recent manufacture, perhaps 1970s-1980s & possibly Asian origin. I have several in my collection, one of which was purchased in Vietnam by the dealer who sold it to me. Quality-wise, this vase does not compare with most of the original Victorian era ones or the modern Fenton ones either. Sometimes these vases are referred to as art deco or Depression glass, but I personally do not believe these are of that vintage, despite some superficial resemblances in terms of colour. The finish on these particular vases is not even up to that of typical early 20th century pressed glass, as the mould fins are very obvious & the amount of glass used in each pressing of the vase (from comparing different examples of the same vase) varies considerably. In terms of hand vases, they quite are commonly found.
Nevertheless, they are still pleasing examples of the hand vase genre & very decorative.