Thank You, Tom!
I will modify my crude timeline to reflect all that. After dinner.
(I spent the day un-bubba-izing an 1891 Argentine Mauser and hopefully it will resemble a carbine when finished)... 
I would like to include the Vickers & Spandau times as there are Lugers with those toggles. I have never seen [pics] of a BKIW Luger toggle - is there such a thing??? Or would the BKIW Lugers have DWM toggles???
I don't know the approx times of the Vickers/Spandau Luger parts...