a more than likely reason for the appearance of a cloud effect is simply that the colourant and glass have not been mixed/combined fully - could be wrong, but if this were blown then wouldn't there be a polished pontil/blowing iron scar somewhere. Not old, in my opinion - no particular reason for thinking it's older than 1960 - 70, or even more recent.
quote...................."Seems a fairly stylised design that ive not seen before"........ not so sure that I'm seeing what it's a stylized design of - a barrel did you have in mind

I assume it's solid - and do the mould seams encircle the piece, or are they limited to part only.