Ivo I would lean very, very heavily (95%) toward Fostoria with one of their Brocade etches that ran from 1927 to 1929 only. These Brocade etches (Grape, Cupid, Paradise, Victoria, Oak Leaf , Oak Wood & Palm Leaf) all had the shiny irridescent finishes that does resemble stretch, but is not & were used on so many early blanks that its very tough to get you a line number. Ken