Beautiful rifle, nice pick up! I love Schüler rifles, and I must say I am not completely familiar with their serial sequencing but here is something interesting. My 8x68 Schüler is s/n 28200, barely past yours, and proofed in 1942, and it’s not an old stock action either, it’s roughly a 1941 Astrawerke made piece. I find this quite curious and interesting!