wenn seeing this 10,75x68 Schüler again was thinking about your new one. this rifle here is very close in the make up to a 1920s Schüler for the 12,7x70 I had in my hands.

the proof marks showing this rifle is probaly made before june 1934. it looks like this rifle starts as 9,3x64 but was then rebored for the 10,75x68. there are older proofmarks under the new ones but I think all was still be done in the shop of Schüler in Suhl

I think we should look a little bit on the serial numbers of schüler rifles.
the 10,75 x68 is 26190 and made in 1934?

your 11,2x72 is 17862, to bad without the proof date. I think its fair to say this rifle must have been build around 1930?

your Peterlongo Schüler have the SN 11542 and is proofed in Ferlach /Austria in 1909?