Bertoni's were made in Italy, and although Ben Lawee was the originator and importer for both Univega and Bertoni, from what I've gleaned they were separate entities. The Italamerica was #7 out of their 8 bike lineup (see attached), but still a nice bike.
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72 Frejus (for sale), Holdsworth Record (for sale), special CNC & Gitane Interclub / 74 Italvega NR (for sale) / c80 French / 82 Raleigh Intl MkII f&f (for sale)/ 83 Trek 620 (for sale)/ 84 Bruce Gordon Chinook (for sale)/ 85 Ron Cooper / 87 Centurion IM MV (for sale) / 03 Casati Dardo / 08 BF IRO / 09 Dogma FPX / 09 Giant TCX0 / 10 Vassago Fisticuff