Large

The large-format numismatic albums and large-size interleaving sheets are storage and preservation solutions designed for large-module coins, including modern coins of 50 mm and larger, medals, large commemorative coins, and certain ancient coins of significant diameter.

These large-format coin albums are distinguished by their superior dimensions compared to standard albums, allowing for plastic sheets with large pockets designed for coins whose diameter exceeds common formats. The large-size interleaving sheets are made from inert materials, typically polypropylene or Mylar, ensuring no chemical reaction with the metal alloys of the stored coins.

The transparent pockets integrated into these sheets offer front-and-back visibility of coins without direct handling, thus limiting the risks of degradation due to contact. The large format is particularly sought after for collections of 2-ounce and larger silver coins, large-module bullion coins, ancient ecus and thalers, as well as colonial coins and certain French royal coins such as large-format louis d'or or gold and silver ecus.

The ring binding of these albums allows for the addition or removal of sheets as the collection evolves. Some models feature a rigid cover in faux leather or resistant synthetic material, with a fabric or embossed spine, providing enhanced mechanical protection against shocks and dust. Other models are designed as spiral binders or portfolios with fixed sheets.

The separately sold large-size sheets are compatible with the majority of standard albums with 4-ring binding or 2-ring binding, depending on the spacing type chosen. It is advisable to verify the ring spacing compatibility between the sheets and the album before any purchase, as standards may vary by manufacturer.

Among the most common pocket formats in this category are 1-pocket sheets for very large coins or medals, 2-pocket sheets, and 4-pocket sheets for modules between 45 and 55 mm. These formats meet the needs of collectors specialising in modern commemorative coins issued by institutions such as the Monnaie de Paris, the Royal Mint, the US Mint, the Perth Mint, or the Münze Österreich.

The long-term preservation of coins in these holders requires prioritising materials certified PVC-free, as the migration of plasticisers is known to cause irreversible stains and alterations on metal surfaces, particularly on silver and copper coins. Products conforming to museographic conservation standards are to be preferred for valuable collections.