I came across this two-in-one ghost sign combo at 798 Eddy St. just off Van Ness Ave., San Francisco’s old “auto row.” The Pioneer Motor Bearing Co., with its jaunty arrow, is fairly straightforward. The older sign? I think it says Stark Motor Co.
Judging by the centered “six” circle and gauging the apparent width of the original sign, it looks like the first two letters are missing, and “Stark” is what comes mind. What do you think? Perception Filter is puzzled by this one, too.
In any case, in addition to SF, the company had six additional locations: Los Angeles, Seattle, Portland, Fresno, Boise, and Spokane. The best part of the sign is this painted Art Deco flourish: