The D = 70/20.7 mm is marking for a 2 3/4" chamber, 70mm (2.756") being the length & 20.7mm (.815") being the diameter of the chamber just ahead of the rim seat.. The little rampant lion over PV shows smokeless powder proof. It would however have been proofed for CIP standards, NOT US SAAMI spec loads.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra