Obsessed -
First - I had a 'senior moment' with 1906. I meant 1912. Only a very few were sold after that date. The "Top lever (new pattern)
ejector appeared in the books in 1910. I assume that was the "screw grip." Later in the books, it was identified as the "screw grip."

I wish I knew what "barrel filer and actioner" meant - but I don't.