100 Riels

The Banque Nationale du Cambodge was established in 1954 following independence from France, replacing the Indochinese piastre with the riel. This 100-riel note spans a print window that brackets the 1970 coup in which Lon Nol deposed Sihanouk — an event that abruptly ended the issuing authority's political continuity and left quantities of prepared but unsigned stock in limbo.

The "not issued" signature status is the key fact here. Giesecke & Devrient completed production, but distribution was never authorized — likely a casualty of the governmental transition and the monetary disruptions that followed as the Khmer Republic moved to assert its own financial institutions.