I agree with obverse 6, and I think rev G, too.
A close up of the top of the lighthouse and a close up of the hand on the shield might help.
According to Peck, they're both C common, though I think Freeman probably had a more accurate view of relative rarity.
Also worth looking at Gouby, if you can get it, if not, see
http://www.michael-coins.co.uk/GBpenny2.htm .