It's definitely German (Bohler and Krupp were the two biggest suppliers of steel for German gunmakers), but trying to figure out who exactly made it is going to require more information. Have you looked along the entire length of the rib (some markings are very light and hard to read, especially on an engraved rib)? It's a back-action side-hammer, which was last popular at the end of the 1800s, but the proofs on the bottom of the barrel will be a better clue as to when it was made. Your first step should be to break the rifle down into its 3 main parts (forearm, receiver and barrel) and take a very close look at every single one of them for any names or addresses, and take CLEAR pictures of any stamps.
Gun control in Canada: making the streets safer for rapists, muggers, and other violent criminals since 1936.