this may be a refurbishment during the Second World War.
1) stamped on left of top strap
2) stamped on left frame
3) stamped on trigger and right side of trigger guard
4) stamped on base of frame in front of trigger guard & stamped base of lug & stamped on cylinder
5) carved into base of left hand grip
1) '17 over crossed pennants over P over broad arrow over crown over B over 74 over crown over F2 over E over MARK VI over crown over 29 over crown over [illeg]
2) WEBLEY MARK VI PATENTS 1917