[CR]Bianchi Lettering changed when?

Question to the Bianchiologists:

When did Bianchi change the style of the letters for the word "Bianchi" from the old style (as seen on http://www.classicrendezvous.com/Italy/Bianchi/bianchi_cyclart.htm) to the modern letters (like on this one: http://www.classicrendezvous.com/Italy/Bianchi/Bianchi_S-Smith.htm)

a friend owns a low-end bianchi with a wild combination of parts - Universal long reach brakes, Shimao Lark drailleur, etc... that looks all together very sixtyish in design, but already has the new letters on it. (pic on http://forum.tour-magazin.de/attachment.php?attachmentid=36200)

Any idea which decade that might be?

regards,
Martin Appel
Munich, Bavaria