SU 25 is a stamp sometimes claimed as a rework or simply a issue stamping.
This was an early 1908 (stamped with proofs and acceptance as expected on the left) and then the gun was modified with a hold open; this is shown with your picture of the acceptance marking on the right of the frame.
Then stamped with 1920 reichswehr property stamping; thats not a date and then went into police service at soem point.
Ed
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Edward Tinker
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Co-Author of Police Lugers - Co-Author of Simson Lugers
Author of Veteran Bring Backs Vol I, Vol II, Vol III and Vol IV
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