These chips were used at the Fremont roulette table in 1956. I bought two from a man in Florida with some other $1 and $5 Fremonts. I asked him how he could be so sure of the date. He replied he and his bride honeymooned there and he took all the chips as souvineirs on his wedding night. I have a #2 and #3, your's is the first #1 I've seen.