3-D model of a Roman steelyard from the Landesmuseum Bonn (without Inv. No.). Click on the illustration to view the interactive model. Measuring the scales with their many markings is extremely time-consuming. Now, instead of working with the object in question directly on site, it is possible to use a digital model. The degree of precision is rigorous, and the method does not affect the objects themselves, many of which are quite fragile. The project will make the models freely available.