Square capsules

Square capsules are rigid protective devices designed for the storage and presentation of coins, medals and tokens of square or rectangular shape. Made from transparent plastic material, generally acrylic or polystyrene, they allow both sides of the specimen to be observed without direct handling, thus reducing the risks of scratches, oxidation and contamination from skin oils.

These capsules consist of two interlocking parts ? a base and a lid ? that snap together to form a hermetic case. Some models incorporate a sealing gasket providing enhanced protection against moisture and atmospheric agents.

Square numismatic capsules are available in several internal dimensions to accommodate different coin formats: standard sizes covering square coins struck by various world monetary institutions, including those issued by the Royal Canadian Mint, the Perth Mint of Australia or the Royal Dutch Mint, known for their series of non-round geometry coins.

Choosing the right capsule depends on the exact dimensions of the coin to be protected, expressed in millimetres. A model whose inner cavity precisely matches the size of the specimen should be selected, in order to avoid any movement likely to cause friction.

These accessories are compatible with storage trays, binders and numismatic cases accepting square-format capsules, making integration into a structured collection system easy. They are suitable for both amateur collectors and professional numismatists wishing to store and display their coins under optimal long-term preservation conditions.