I'd assume that the serial number of 108348 is that of Sauer so from Jeff Stephen's list that would date the sporting weapon to 1904. During this time the Gewehr und Munitionsfabrik concern Adolf Loesche was supplying some sort of target arms to the German Army to employ. Sources give there were 3 different chamberings for the target arms. Adolf Loesche of Magdeburg & Hannover advertised as a Weapons and Ammunition maker but more than likely he sourced his sporting weapons from Suhl or Zella Sankt Blasii - Mehlis.
Kind Regards,
Raimey
rse