I took my Kristalunie Maastricht book out to compare the 1931 Roozendaal vase with yours - I don't think it's the same vase.
The 1931 design is indeed a vertical optic round vase that Roozendaal designed to be sold at Metz & Co, a shopping mall in Amsterdam in those days, but I see a difference from the photo in the book.
The vase to be ID'd here has ribs that do not go down entirely straight, but curve slightly to the left towards the bottom (shown to be the same on the ebay vase, so that looks to be deliberate) while Roozendaal's ribs go straight down (in all his ribbed designs that I've seen so far).
Julie's vase could be this Roozendaal, but I'd have to see the rim more clearly to compare.
The one on Pamela's site could be Roozendaal's 1931 vase - the photo in my book has 8 ribs total on that vase, Pamela's has at least 2 more, but that could be a size issue.
Astrid