Dental Arts Building: 1908
The wall adjacent to the "Zell Bros" sign in my previous post also carries a ghost sign, this one on the building's north face. There's not a whole lot of "Dental Arts Bldg" left to see, time having taken a toll. Below the lettering is a barely visible image of spectacles, indicating that the building's history of professional offices included more than dentists.
As with the "Zell Bros" sign, this is facing imminent demolition. You can see this from the street on SW 9th between Yamhill and Morrison, or do as I did and go up a few floors of the parking structure across the street for a better view.