Harry Powells 'Glasses with Histories' has a near identical piece which is numbered 1344, its from the German, Flemish and Dutch glass section, which are drawings taken from museum pieces in 1904. But with these streams of bubbles I think it can not be Powell, maybe its an old Germanic piece, also the colour doesn't strike me as German and I would expect to see a snapped pontil in the base. The base to my eye bulges down and looks more modern.