Some of my favourite items from my collection of Scandinavian/Mexican jewelry 1950-1980

Here you see a bracelet by Rebajes in silver and copper from the 1950's; a silver and rutilated quartz pendant & chain by Lapponia (Weckstrom or not? Can anyone tell me the name of this design?); a Jensen watch witch mountain crystal lens designed byVivianna Torun Bulow, and a brooch with obsidian by Los Castillo ( can anyone tell me a date?1950s?).
My collection of modernist jewelry ranges from 1950 / 1980 and includes items from Scandinavia, Mexico and USA.