This white-painted Polyp was one of the two new rides Powerpark introduced in 2004. These kind of rides have been made by several different companies, all copying each other. The Polyp with this gondola type was originally designed by Kaspar Klaus in late 60's / early 70's. Polyps with same kind of gondolas have since then been sold by at least Jan Bakker-Denies, CAH, FAH, Ihle, Soriani & Moser, Zamperla, and Levent Lunapark. So it's very hard to tell the manufacturers.