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Dark blue ring with white code:


Nicola Baccetti, Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA), Sede amministrativa ex–INFS, via Ca' Fornacetta 9, I - 40064 OZZANO EMILIA, Bologna, Italy

tel. : +39-51-65.12.219.
fax. : +39-51-79.66.28.

e-mail: nicola.baccetti"at"


– Old-style 3 alphanumerical codes starting with X and Y can be very easily misread.

– For the new-style 4 alphanumerical codes, the zero in the rings 0-A-letter-letter and 0-B-letter-letter have a dot in the middle and can be mistaken for a 'B'.

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