Here is Allan Myers answer that is posted on the club BB.

Paul Cummins put out several promotional chips in the early 1960's.
One was your chip at La Cienga Blvd. in L.A.
The other was at the Seattle World's Fair, New Washington Doric Hotel, Seattle, 1961-1962. All of the chips had the
SQSQRT (Square Square Rectangle) mold.