The Leuchtturm Grande M 20-Compartment Numismatic Pouch, reference 324851, pack of 5, is a coin filing sheet measuring 50x50mm each. Leuchtturm is a German brand founded in Hamburg in 1917, considered a world leader in collection systems for philately and numismatics, with a catalog of over 6000 items covering more than 140 collection areas. Made of transparent film free of acids and plasticizers, it allows viewing of coins on both sides without removing them from the sheet and without risk of oxidation from contact with chemicals. It is compatible with the Grande M classifiers from the same brand. With more compartments than the 12-compartment version of the same Grande M line, this reference is suitable for those with a larger collection of large-diameter coins.