I love the fact that it was intended to be called 'King George 111',
but they genuinely believed that Americans would think they had missed the first two films and so they changed the name......
Mintmarks apart from when they were featured on captured bullion were made redundant 500 years ago when the date was added to coins - what a brill idea that was - wish I
had copyrighted it - I would be worth a fortune now , I also would be dead i surpose, LOL
Personally I’d just cover them with a generic description page, clearly they are not a true die variety and could presumably occur with any date, especially if a grease-clogged die is the cause as suggested.
Jerry