1964 GOP Convention Ashtray, San Francisco

This is an interesting old ashtray, I just got, from the 1964 Republican Convention, that was held in San Francisco that year. It has an elephant and San Francisco GOP 1964 on top. I was told these were placed in Hotels, during the convention, though I have not found another. Also as ashtrays go, it’s quite large, measuring 14" across. It’s the biggest one by far, in my collection.