I think I can recommend 2 new issuers;
1) is Burkina Faso, which seems to be still missing from the country list; doc_man and I could share this one as we already do the Congos;
2) is the Sinhalese Kingdom, basically all the coins in Ceylon from before 1600 (the Massa coins), as they are very distinct from the colonial issues (which I have refereed for considerably better). Someone else can be ref for this one.
Any background/source with information/data on this? (besides Wikipedia and related references)
Sapientiae plerumque stultitia est comes.
Si c'est un grand plaisir d'être reconnu par ses amis, c'est peut-être encore plus flatteur d'être reconnu par ses adversaires.
Be yourself; everyone else is already taken.
Any background/source with information/data on this? (besides Wikipedia and related references)
All the catalogues I've seen on those coins aren't related to the colonial issues in any way; no catalogue lists both kinds of coins together.
An example of this in the catalogue is this reference: Oriental Coins and Their Values: The World of Islam by Michael Mitchiner (Hawkins Publications) which lists some of the early Sinhalese coins.