Commission Implementing Directive (EU) 2019/68 of 16 January 2019 establishing technical specifications for the marking of firearms and their essential components under Council Directive 91/477/EEC on control of the acquisition and possession of weapons (Text with EEA relevance) (c. 68)

ANNEX Technical specifications for the marking of firearms and their essential components

4. The numeral system used in the marking shall be as laid down by the Member State. The numeral system or systems laid down by each Member State shall be Arabic or Roman.