Munitions Workers

[Chipper]

Here is a Female OWS badge. I believe this to be nickel plated (or could it be while metal?). This one is made by Gaunt. I understand there are some theories about as to why they were plated; it could be for:

Senior workers
Long term workers
Simply a worker who had the money to have it plated.
A post war adaptation.

Interested in any other info or theories.

Cheers, Tim