The only way to date is that if the "ELG" proofmark has a crown over it, it is post 1893. Francotte made those Martini rook rifles from the late 1880s through the 1930s. Generally they were nicely made and the equal of British made Martini rook rifle. Its a shame Colin Greenwood elected to leave Martini rook rifles out of his otherwise fine rook and rabbit book.