Hi - I have an Echo scarf with the same tag, and signature. I noted that there isn't a (c) copyright symbol - this would make me think this is earlier then then the 70's. RN #'s started in the 50's....I would probably date this scarf some time from the 50's or 60's -
The rn for that scarf dates it to an earliest date of 1963, although it could be made later than that.