I stayed up last night and did what CAROLINASKIES said and google this sign. Almost everyone I came across had chips all around the enamel where this sign obviously was either mounted or had something attached to it. We all know it takes a little power to chip porcelain. I realize it is not neon from 57 TBIRD , but for the life of me I cannot figure out what went in those holes. One suggested it may have been stamped that way. Seems a waste of time if the holes were not used. Maybe the answer is lost to history I guess. Thanks for everyone's help here, I appreciate it. Rob