"Small" Silver ARP badge

[bananamafia]

Hi guys, i picked up this small ARP badge recently, its not something i have come across before.
It is silver, but tiny.
Any ideas on why the difference? economy maybe?

many thanks
Ed

Picture next to "full" sized one to show scale:

[BrodieBartfast]

Have seen quite a few of these. In a book I have concerning Home Front collectibles, they state that smaller versions of the ARP badge were made for wear with civilian clothing, so that a member of the ARP could be identified when off-duty.
The same was true for a lot of the civilian services, I believe. My great grandmother was in the ATS, and among all of her stuff from that time is a tiny ATS badge with a pin back, just like this one.

B.B.