Dwight,
I think the nuance of difference in what you are looking for that isn't being picked up on is the fact that the KOL sear bar has the post 1916 relief. The M11 and Vickers have the standard grip-safety sear, but a KOL has a sear bar that permits unloading with the safety on. As you have shown in your want ad, it takes a relieved sear bar to be authentic.
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If it's made after 1918...it's a reproduction
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