6803 Worked slate and articles of slate or of agglomerated slate (excl. slate granules, chippings and powder, mosaic cubes and the like, slate pencils, and ready-to-use slates or boards with writing or drawing surfaces)

6803 (01/1988-..) Worked slate and articles of slate or of agglomerated slate (excl. slate granules, chippings and powder, mosaic cubes and the like, slate pencils, and ready-to-use slates or boards with writing or drawing surfaces) 68030000 (01/2011-12/2011) Worked slate and articles of slate or of agglomerated slate (excl. slate granules, chippings and powder, mosaic cubes and the like, slate pencils, and ready-to-use slates or boards with writing or drawing surfaces) 68030010 (01/2012-..) Roofing and wall slates, worked 68030090 (01/2012-..) Worked slate and articles of slate or of agglomerated slate (excl. slate granules, chippings and powder, mosaic cubes and the like, slate pencils, ready-to-use slates or boards with writing or drawing surfaces, and roofing and wall slates)