Vintage Carvalhu Copa Collection Brutalist Brazil Bracelet Quartz 1970's

This bracelet is an eye catching conversation piece!  It is a beautiful piece! Designed by Ernandes Carvalhu, for the Copa Collection.  Carvalhu's studio was located in Rio Brazil, the bracelet was made in the late 1970's to early 1980's.  It is a hard to find, rare bracelet in a metal presentation, as most of these were made in brass.  In a Brutalist design, it has a wild freeform with raw natural amethyst stone. The measurements are in the photos it's a lager cuff for beautiful attention