So Ford, let me see if I understand you correctly. The Treaty of Versailles over-rode the German proof rules for 1912 for which a tube of the same diameter can have a chamber modification, i.e. material can be removed internally & it does not warrant a Crown over R repair mark?

Also, the 8x57 IR/IRS and the 8x60 have identical characteristics?

Is the above the gist of your statement?


Cheers,

Raimey
rse