Hi,
My definition of 'Original' is when something was made during the time it was in use.
So, for example, if a police service used a pistol and its holster from say 1914 until 1971, every holster made between 1914 and 1971 is original in my view. Anything produced after the issue time is a reproduction.
Take the East-Germans, for example. Any hoster produced for the DDR between 1945 and 1991 is original, everything produced afterwards is a reproduction, etc...
There probably are exceptions to the rule, but then again exceptions confirm the rule