I have a few chips from the Music Club. The information given to me when I bought the chips was that they were used in a Union Hall game on Post Street in San Francisco in the 1960's. I also have a few that say Local 41 which is also attributed to San Francisco. I do not collect California chips so am not an expert on that area. Maybe someone else can let us know for sure that these are San Francisco chips. All are rectangle/diamond mold design. Bob