Ouch. This one hurts. For years this "SHELL GASOLINE" sign had been carefully painted around, the gray building paint carefully avoiding the old ad. Then in the last two years somebody had the great idea to what, restore the sign? This literally hurts my eyes.
This scallop shell, or 'pecten', emblem style was used between 1948 and 1955. See what's left of it (if you dare) at 726 SE 6th Avenue between Alder and Morrison.