Do the two "palm fronds" next to "Acier Hercule" mean double proof? I've seen pictures of three palm fronds on Darne before. What does 1100 kilos stand for? im curious because I know of a 20G "French" SxS at a LGS that I will look at next week. Ive got 65mm 16's on hand but a 65mm 20 gauge is a different situation and I would probably want to get it lengthened.