Friedrich Jacob Bartels (1869 - 1926)ran the Bartels family gunshop at Bahnhofstr.5, Wiesbaden, from about 1899 to 1926. The rifle is built on a German falling block action aptly named "Ideal". Wrote an article about these actions some years ago in "Waidmannsheil #40 - 42", a publication of the German Gun Collectors Association, www.germanguns.com . These actions were made by an unidentified shop, most likely Cuno Büchel's, in Zella Mehlis for the trade. You find them with many retailer names on the rifles, among them Burgsmüller, Schmidt&Habermann, both Kettners, Simson, Greifelt, Glaser, Miller&Greiss and you name them. Both Fred Adolph and Paul Jaeger in the USA. These actions were produced at least from 1911 to 1941. Frank de Haas aptly nominated them as "the best German falling block action", but ascribed them to Schmidt &Habermann from a rifle marked such.
I am very interested to see a photo of the proof- and other markings under the barrel, visible after removing the foreend. These marks will most likely allow to identify the proofhouse, most likely Zella-Mehlis, and the date of proof.