Great picture.
the problem is that the afrofischeri hasn't got a good presentation in the catelog; just a little lousy pic and a stamp wich shows a fish that doesn't even remotely look like an afrofischeri.
your last pic shows a clear view at the humeral. now it's one for the ichtyologists.
the reason why I'm thinking it's afrofischeri is the top pic and then the reflection of the lower fish in there.
one of the hallmarks of afrofischeri is the thin light band running down the flank and the inverted 'eggtimer' brown blons above and below. this line is something like the line on Pseudobagrus stenomus.
few Syno's have it, but afrofischeri has.
it makes the fish resemble (vaguely) Mochokiella paynee wich also has it.
the other marks are also there; slender build fish, small, big eyes, big pectorals with brown markings, bigger and smaller irregular brown spots on a light background, long mandibular whiskers and a deeply forked tail.
unfortunately Lake Victoria isn't even near Cameroon.....if they're really from Cameroon, they're something else.
however, very very few fish get exported from Cameroon; maybe it's a mess-up?
I've seen afrofischeri's "in the flesh", repeatedly, but also years and years ago. but they looked a lot like your fish.....