Not sure if this helps - probably not that old.

From Middle Eastern and Venetian Glass Beads by A. Panini.

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

The search words I used were "West African people [and] albumen or silver gelatin." You could try other combinations of these words with country names instead of W. African or daguerreotype, etc.

https://www.google.com/search?safe=active&tbm=isch&sa=1&ei=3I0TWpPlDOKa_QaPnI2AAw&q=vintage+west+african+portraits+albumen&oq=vintage+west+african+portraits+albumen&gs_l=psy-ab.3...40538.57422.0.59962.20.15.0.0.0.0.4920.11686.0j9j2j9-2.13.0....0...1c.1.64.psy-ab..7.2.331...0i7i30k1j0i8i7i30k1.0.bL1pJiFZmFc

https://www.google.com/search?safe=active&tbm=isch&sa=1&ei=Go4TWvfII5Kpggfy5ZLAAw&q=vintage+west+african+people+albumen&oq=vintage+west+african+people+albumen&gs_l=psy-ab.12...28937.30344.0.33034.6.6.0.0.0.0.185.755.0j5.5.0....0...1c.1.64.psy-ab..1.0.0....0.9lb23W4Gqi0

https://www.google.com/search?safe=active&tbm=isch&q=vintage+west+african+people+silver+gelatin&spell=1&sa=X&ved=0ahUKEwir0967zs7XAhUjneAKHXkWCzgQvwUIOygA&biw=1184&bih=558&dpr=1

Searches: albumen + [Africa or historic country name]

https://www.google.com/search?rlz=1T4ADFA_enUS460US460&biw=1120&bih=566&tbm=isch&sa=1&ei=ZZITWsyhIo7q_AaJ_YjwAg&q=albumen+africa&oq=albumen+africa&gs_l=psy-ab.3...38193.40239.0.41207.7.7.0.0.0.0.503.1535.2-3j1j0j1.5.0....0...1c.1.64.psy-ab..2.4.1022...0j0i7i10i30k1j0i7i30k1j0i7i5i30k1j0i8i30k1.0.PfXpEfc12Uc#imgrc=_&spf=1511232142359

https://www.google.com/search?rlz=1T4ADFA_enUS460US460&biw=1120&bih=566&tbm=isch&sa=1&ei=LZQTWrX2BYTq_Aar-KLgDw&q=albumen+%22gold+coast%22&oq=albumen+%22gold+coast%22&gs_l=psy-ab.12...0.0.0.71133.0.0.0.0.0.0.0.0..0.0....0...1c..64.psy-ab..0.0.0....0.uitzhRUmlWM

Any luck finding images?

I'm working on a research project of my own (not bead related) and sometimes your question comes to mind while I'm checking source material. I sent you a message with a few additional thoughts on sources for early images of West Africa.