As has been pointed out the case and pistol did not start life together. The canvas and leather case was an option from 1938 and intended to house the slant grip Senior. The Mark I pistol is an interesting early variant from around 1925/6 (can't quite make out the serial no), possibly imported by Hoffman Arms rather than Stoeger, who were later associated with importing Webleys into the USA. As to value, the case is a very desirable item and should attract at least £500 on its own from the right buyer as it is in very good order, judging from the pictures. The pistol - probably £160 or so.

John