Large vintage metal sign, "NO PARENTAL TRAFFIC BEYOND THIS POINT".

I got this at an antique fair a few years ago from someone who believed it came from a school in late 60s or 70s. I don't know much about it, and can't find any similar signs online. I have enjoyed owning it but it's time to pass it on.

Shows its age, lots of marks and chips. Most notably some sharp points near top-left corner as shown in photo. There is also some muck on the back. It needs a clean.

Measures approx. 48" x 24".

Free UK postage or Edinburgh collection. I don't have a box large enough, but will try to pack it safely with padding.