| http://www.w3.org/ns/prov#value | - Preferably, the turning device positions a surface, preferably the surface area containing the first security feature, in an area in which it can be checked for the presence of the security feature. [0026] Although a second security feature can comprise a wide array of features, such as, for example, watermarks, the use of a superfluorescence sensor is especially advantageous. [0027] Preferably, t
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