Yes, there was an 18 century French gunmaker called Delomosne.
Yes, Charles Boswell was a gunmaker at 126 the strand in London W.C.
A gunmaker.
John Harper was an independent gunsmith/gunmaker in Birmingham, England in the early to mid Twentieth century. There is lots of information about him and his family in Douglas Tate's book on Birmingham Gunmakers.
What is the question?
1893-1957 BY JOHN BROWING CAME IN 12-16 GAUGE PUMP ACTION VARIOUS BARREL LENGTH.
Annie Oakley - 1954 The Dutch Gunmaker 3-34 was released on: USA: 17 February 1957
Neither. It was Joslyn.
Remington makes a model which does.
Browing catalog
Belgium and Japan
No published sn data