If your bottle has a screw cap, then it would be dated from c1968. If not, then it would be dated from slightly earlier, c1960. "If" you are thinking of parting with it, the Diageo Archive Collection would love to have it. Diageo is Johnnie Walker's parent company. Please contact Christine and let her know (she sent you an email). Hmmmm..something to think about, huh?!