16 Paper cardboard; printed matter; stationery; boxes of paper or cardboard; bags, envelopes and pouches of paper or cardboard for packaging; wrapping paper (stationery); writing instruments; pouches for writing instruments; cases for writing instruments (stationery); inks and refills, desk mats (stationery); writing books; calendars, note books, indexes, covers stationery, files office requisites, announcement cards stationery; writing paper, envelopes, index cards stationery; business cards; writing pads; pens office requisites, pencils, pen and pencil holders, paperweights, diaries, covers for diaries; inkwells, passport holders, cheque-book holders, cheque-book covers, pen and pencil cases; document holders and covers, albums, bookends; pen nibs, money clips; letter trays made of leather and pen trays made of leather