An indicator on a film cartridge to indicate whether a film cartridge has been used in a photographic camera. The film cartridge includes a spool having an elongate coaxial hole open at one end. An indicator, disposed within the coaxial hole, is deformable from a first state to a second state in response to the film cartridge being received by a plunger in the photographic camera; the second state being visually different than the first state. The indicator has a continuous, non-punctured, non-fractured configuration when in both the first and second states.