Doesn't work. I have tried typing carefully, 10 times (counted them!) hitting Return each time, and each time it reverts to lower case b. It is treating upper case and lower case as the same. Anyway, it is only a minor issue, so no worries.
@Jarcek I agree entirely that the field ‘Issuing Entitly’ should not be used for issuing banks in the banknote section. Unfortunately, the field of ‘Issuing Bank’ cannot be added to.
I will update Issuing bank for Polish banknotes with National Bank of Poland throughout, as I add other edits.
[I see you have updated ‘Issuing Bank’ for Finland also, way ahead of me, I was about to post a request ;)