Click Here to Continue Viewing Current Query Results or Home to Start a New Query. Description: Econom Manufacturer: Type: Rollers-2 Country: Switzerland Patent: D.R.P. Bte S.G.D.G. Comment: There are two sets of rollers. A flip lever is used to select one of the two sets depending on the degree of sharpening required, as shown in the picture. Source: twillard Editors: