D.L. Hudson and I had just crossed 13th Street at Jones to get a better picture of the Skinner's Macaroni Products sign. But, what's that at the left????
Not one, not two,
But three ghost signs for White's Yucatan Gum!
Three! Three wonderful ghost signs for White's Yucatan Gum! Ah ah ah!
And a quick websearch finds a small, but intense collectable market for White's Yucatan Gum products, like this tin, and this pocket mirror, and more than a few other photos of not just White's Yucatan Gum signs, but specifically this display. (Link 1 and Link 2)