Well. here is a strike in black on a full newspaper. The date is rather late, but it is suggested that it was struck in error.
The image does not seem to be an oxidised orange, as it is a pretty even black, but it could be as there is a tiny bit of orange in the (indistinct) letters of 'NEWS'. I prefer to think that the clerk used the wrong pad, and that there were traces of orange left from previous usage. Purchased recently as Lot 1364 in 21st Century Auctions, together with an(other) example in orange. It will do me, as I will use it for displays rather than as an exhibit.