Just like chips, casino lighters come in a number of variations. This pair is from the Riverside and is very early. Mert Wertheimer ran the gaming at the Riverside from 1949 until his death in 1958. The sliver tone lighter on the left is my newest lighter - I was very happy to see it was different than the gold tone that I already had. This is a very tough pair to get. The Thunderbird also had a lighter of this same type.