ted, i think you are confusing the "sheaths of wheat" stamped onto the tubes of french guns by the proof house at saint etienne with the quality markings placed on the barrel flats (typically on one side only). proofs placed on each tube are the result of the testing....each tube by the proof house....the quality markings that T A S has inquired about are not the result of a proof test - they are, as you note "boasting and advertising"....as such they do not require marking on each side of a sxs....v series darne's exhibit a plethora of the circular quality markings....those correspond to the 5 laurels that T A S inquires about.
only photo i can quickly locate that provides an example, see third picture
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=587625#Post587625
