Help ID dummy revolver cartidge

Please help ID these solid brass Dummy cartridge (on right). Looks like british .380 (on left)…

I have many very similar ones, all made either from original cases with turned brass bullets, or like in this cases, made from enterely brass bar stock.
They where made by or for the North-Rhine Westphalian Police Forces in the 50thies, as the first guns for the NRW Police came from britih Forces…
The dummies where made by the Police Gun-repairstations on their own…thats why they exist in many forms. See attached photo



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Thank you very much Forensic!!