I searched on combinations of "vintage Ghana people portraits ceremonial" to find the below links, but you'll have to make a finer grained pass through the images to find relevant photos, if any (since I'm not familiar with African beads). If you'd like more links and could provide additional information (other countries, who wore the beads and when), please let me know. You might also try searching Google Scholar and the Internet Archive and adding "museum or archive" to the search terms "[country name] + people or portraits."

https://www.google.com/search?q=vintage+ghana+portraits&tbm=isch&tbs=rimg:Ca1tqCJKR8NxIjiG2ZrZkDxNR5W1NfWr8Y_1HBSyO6fNuzTDUou5RLXSKrAAlRlKiOHNYGMlrc8b-xfpcILydioFcYyoSCYbZmtmQPE1HERC03zDi7NaeKhIJlbU19avxj8cRDU6WI6INPBYqEgkFLI7p827NMBF2Ttt_13pJvayoSCdSi7lEtdIqsERs5VOSKq6XEKhIJACVGUqI4c1gRfEybPw2Lr_1YqEgkYyWtzxv7F-hFLnUJ7m5ldrSoSCVwgvJ2KgVxjEb3rIqpTzK-Z&tbo=u&sa=X&ved=0ahUKEwjA1sCcxM7XAhUhTt8KHRakAisQ9C8IHA&biw=1120&bih=566&dpr=1.5

https://www.metmuseum.org/exhibitions/listings/2015/in-and-out-of-the-studio

https://www.google.com/search?q=vintage+ghana+people&rlz=1T4ADFA_enUS460US460&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiY-7zlx87XAhWQpKQKHbH1B34Q_AUICigB&biw=491&bih=529&dpr=1.5

https://www.google.com/search?rlz=1T4ADFA_enUS460US460&biw=491&bih=529&tbm=isch&sa=1&ei=NogTWsLhAcWpggff9K7wAg&q=vintage+ghana+people+ceremonial&oq=vintage+ghana+people+ceremonial&gs_l=psy-ab.3...178737.188845.0.190182.23.16.3.0.0.0.2273.7160.3-1j1j5j0j1j0j1.9.0....0...1c.1.64.psy-ab..13.0.0....0.h2rcGSVeAd4