Antique bronze objects made of Cu-Sn/Cu-Zn alloys have been widely characterised; unfortunately, the employment of binary alloys gave way to the use of more common ternary (Cu-Sn-Zn) and quaternary (Cu-Sn-Zn-AS) alloys around the beginning of Roman Empire. Aim of the research is to study a set of tests of known chemical composition (ternary and quaternary alloys), that underwent different technological procedures. Results will improve a non-destructive calibration method for archaeological objects. Improving the accuracy of measurements for ternary and quaternary alloys is the principal aspect of the proposal. Moreover, the employment of replicas that received different but totally controlled technological procedure will provide data on strain and particle size effects. Results previously obtained on Roman Army artefacts left open several questions that can be verified by this research.