 North American prototypes were also manufactured and marketed under the Aurora "Postage Stamp" brand; later these items were sold under the American Tortoise, Model Power and Con-Cor brands.Trix sometimes utilized North American consultants to aid in the design of this portion of the product line.The "Hornby Minitrix' brand was used in the 1980s for a short lived range of British outline models using the earlier product tooling.