I'd say it went into police service, but never received a police sear safety, as it was just the police that used the numbers as telling whether it was the primary or secondary magazine.
Since its an aluminum base, it was a replacement after 1926 and it has a starburst marking, which I attribute to police
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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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