The ARP was a vital part of the Civil Defence network in Britain in WW2.
Here we have a mint pair of membership badges still in the original box. One is pin backed while the other is fitted with a button hole fastener.
These are made from solid silver. The date letter for the silver hallmark is "C" which is for 1938.
The dates for the letters on the hallmark are as follows:
Later badges were made from white metal in order to save on costs.
Men's badges came in a red box, while ladies badges came in a blue box.