Bob and Thor,
Don't forget, a 'witness mark' was applied to the front sight/sight base "after adjustment", according to the 1910 marking regulations. This may prove useful as you examine Lugers in tracking this situation down.
Bob, thanks much for making that interesting and thoughtful post. And Thor, "The Luger Book" is a very useful reference, its worthwhile tracking a copy down.
--Dwight
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