I guess I can say this the third time.
Loan copies of Scott Standard Stamp Catalogue from your local library. This will help you answer a lot of questions. There are usually 6 volumes. Vol 1 Countries A-B, Vol 2 C-F, Vol 3 G-I, Vol 4 J-O, Vol 5 P-S, Vol 6 S-Z. Sort your stamps by countries and get the volume you need from your local library. If your branch don't have it, they can request it from another branch.
I hope it does not sound like trolling. Same answer in the third post in a row, but this is the best way to make sense of inherited