From the Ferrocarril site once more, this shows that the telegraph poles at the line Granada-Moreda at Albolote also had 8 nodes (as I have seen before around 1960 or so at Iznalloz and Bogarre) but the time more important 1966. But those were configurated 2 times 4 horisontal as opposed 4 times 2 vertical at ESPERANZA. But at least seldom 8 nodes has been seen elsewhere as far as I know in Almeria and Granada at the actual time. So for some reason if Piñar is the answer they looked different there but still 8 nodes.