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.
Also Atlas Obscura has written up the renovation of this sign here.
Added August 2018 from the Conor Corbett collection of photos:
(Conor Corbett)
(Conor Corbett)