An original WW2 era? Enamelled warning plate which reads “Danger High Voltage Do Not Touch Whip – Aerial” A.P. 58945. The A.P. stands for Admiralty Pattern so presumably this comes off a ship or at least some kind of Naval equipment. It is in excellent order with minor chips to the fixing holes and comes in its original packaging paper. It measures 6 inches X 3 ¼ inches.