Details of 1904 Pennies for your delectation: Closed ‘9’ where the loop of the ‘9’ narrows to a point and meets the down stroke. This type has a narrow ‘4’, particularly on the horizontal and diagonal strokes, tilted clockwise and low down in the exergue. The foot of the ‘4’ is over a border tooth (number 11, when counted from the tooth under the ‘1’), giving a narrow date. Closed ‘9’ with a narrow ‘4’, not tilted clockwise or low down in the exergue. The foot of the ‘4’ is over the space between teeth numbers 11 and 12. Closed ‘9’ with a narrow ‘4’, which is high in the exergue. The foot of the ‘4’ is over the right of border tooth 12, giving a wider date. Open ‘9’ where the loop of the ‘9’ is blunt and does not touch the down stroke. The ‘4’ is wider, closer to the exergue line and the whole coin is a dark colour. Open ‘9’ where the ‘4’ is again wider, but the whole coin is a light brown colour.There are also unconfirmed reports of three further types: A closed ‘9’ type paired with a thicker ‘4’. An open ‘9’ with a narrow ‘4’. An open ‘9’ type, with a wide ‘4’ but with a short plume to Britannia’s helmet.I just looked at 4 examples that I have, and all of them are Open 9, with 11.5 teeth in date width.