The Leuchtturm Optima 7S 7-Compartment Philatelic Pouch, reference 323995, pack of 10 units, is a stamp filing sheet with each compartment measuring 30x180mm. Leuchtturm is a German brand founded in Hamburg in 1917, considered a world leader in philatelic and numismatic collection systems, with a catalog of over 6000 items covering more than 140 collection areas. Made from acid- and plasticizer-free polyester film, it guarantees safe long-term preservation of stamps without risk of paper deterioration. It is compatible with the Optima stampers from the same brand, in a more compact format than the A4 sheets of the Vario and Grande lines. The narrower dividers of this reference allow for more stamps to be organized per sheet than the 6-compartment version of the same line.