Oregon Transfer Company Building, 1910 1911
I love this sign; huge, bold, colorful. Not as old as many signs in the district, it's a real eye-catcher nonetheless. It's on the west-facing wall of the Chown Pella Lofts at NW 13th and Glisan.
Also compare the more recent pictures with a quick glimpse of the sign captured in Gus Van Sant's 1989 film Drugstore Cowboy. The sign itself has been cut off at top and left, and the white "Chown Showcase" area in the upper right has been replaced with just the word "Chown" and no background color.
1989 - Drugstore Cowboy:
(image: Avenue Pictures)