Taxonomy
Catalogue structure
The classification tree is extensible: new disciplines and sub-fields can be added without restructuring existing records.
Coins, tokens, medals and jetons of all periods and issuing authorities.
Banknotes, treasury notes, emergency issues, occupation and colonial paper.
Postage and revenue stamps, postal stationery and postal history.
Watches, clocks, chronometers and the mechanisms that drive them.
Cameras, fountain pens, instruments, records, books and further documented fields.