We didn’t see much Art Deco in Bilbao and the only buildings we did see were through the coach’s windows.
This one had a magnificent tiger-shaped finial. click on photo to get to my flickr and zoom in on the detail:-
La Equitania is more moderne than deco. Good clock though:-
This one looked decoish from a distance:-
The close-up is blurry and with reflections as it was snatched rather than composed:-
Telefonica/Movistar. Art Deco rule of three in corner windows:-