Directional sign; Trolleybuses, circa 1935

Single sided sign with blue lettering on a cream background reading "Trolleybuses" and a 3 flight Mexican arrow, pointing right, piercing a red ring roundel. Used as a street sign to direct passengers to the trolleybuses, this sign would have been fitted to lamp standards etc. It would have been in a frame, similar to those used for toilet & waiting room signs on Underground stations