Numbering Machine 8 Digit Convex Backward for Heidelberg GTO QM and PM Go to amazon.com Related posts Top gto numbering machine for 2022 FeatureModel: GCL1200Wheels: 8 Digit Convex BackwardCharacter height: 5/32" (4mm) GothicCompatible With: Heidelberg GTO52, GTO46, QM46 (Quickmaster) and PM (Printmaster).