028/29 the first white faced mask is Punu/lumbo mask not a bad looking mask
can't see it properly but it looks a little made up late 20th century but it could be earlier.
No 019/20 Is a Kong Nkisi Nkonda nail fetish but what group/tribe its from I don't know I haven't got my books around at the moment It looks OK but a bit clean! textiles are old nails too, clay hair and glass eyes OK.
No 32 A Kongo piece Bwoon mask, Bushong Kuba culture
The mask could be old but the raffia with cowrie shells+bead attachments some look later additions.
No 047 Looks something like a Liberian Bete Nyabwa mask but what else to say?
No 049/50 I'll leave that one to somebody else I've no idea?
No 062 Looks like a BaPende mask Looks a bit like a tourist piece with old bits of textile and cowrie shells added!
N038 Looks like a Dan mask (Ivory Coast)but they sometimes have a beak but what the extension on that one is I don't know.
Sorry I have to leave it ther I hope i have been of some assistant,