This is very unclear but if you look carefully just above the road/path you can see the RE of the EIRE marking
Loop Head aerial photographs were updated in January/February 2013
This sign was linked to LOP58, given as Corraun, Co Mayo. It’s actually in the Currane estate, a little further east than Corraun I think and it’s not in the worst condition, The number is still in place, although slightly damaged.
Malin Head has been restored since these aerial photographs were done. You can read a report on the restoration here – the restoration was done in 2015. It looks beautiful, far better than it did when I saw it as a child.
Added August 2018 from the Conor Corbett collection of photos: