Disneyland opened in 1955 and since opening day, each cast member has worn a name tag. Some without an actual name printed, but all wore a tag. Here’s a great set of photos taking you through the basic name tags of the past and present. They have certainly morphed, but more or less have kept the same familiar shape. Of course there are many, many themed badges for special events, birthdays, marketing messages, contractors, etc., but you can always tell a real cast member badge from the promotional varieties.
This metal tag was used from opening day in 1955 through the early 1960s. In the late 1950s if the full name was imprinted, it signified a salaried worker or area supervisor. These with the full name were not as common.