Click Here to Continue Viewing Current Query Results or Home to Start a New Query. Description: Tto Stropping Machine (Springs on blade holder) Manufacturer: Querbach & Co. GmbH, Apparatebau Barmen-Wichlinghausen Type: Allegro Type Country: Germany Patent: Germany DRP - 410749(12/7/1925); US - 1558990(10/27/1925)? Comment: Note box and stropper variations. Stropper in round corner box has pat number and smaller tip on the end of the slide that flips the blade. Source: twillard Editors: