ONLINE MUSEUM for OPTICAL CARDS' SYSTEMS

by Landis & Gyr

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DE - "Demonstration Phonecards"
Such cards were used by the L&G engineers in order to perform and demonstrate the system in the factory or on site, at the customers’ headquarters and also for the final performance acceptance tests. L&G also demonstrated the system to a larger public at meetings, fairs, congresses or exhibitions where Democards were given away to the attending visitors (see "Public Cards / Restricted Areas").
Democard for introduction of Full-Face-Printing cards