The black wrap is installed by Laing at the factory. The numbers are batch numbers. You should not try to remove it. Mine has the paper and the number 48, or maybe 40. It's upside down like yours but only the bottoms of the numbers are visible. Mine doesn't have what looks like part of a bar code on yours. I have the bracket
#34111installed so it may be hidden by that. I think I noticed it when I bought the D5 Next but its not a big deal. The number and bar code on yours are in an unfortunate position. If the barcode is a sticker on top of the black wrap you might be able to get it off, but it may leave residue or a difference in sheen. Honestly, I think its luck of the draw. I don't know if EKWB, AlphaCool, Swiftech, or other companies that sell D5 pumps hide those markings somehow..