Badges

[Mary King]

I'm wondering if anyone can help me. Amongst my recently deceased Mother's personal effects is what I believe to be a Canadian cap? badge. It is a brass maple leaf on which there is a crown with the word "Canada" underneath. On the reverse on the pin part is "F N B'HAM".

Is this likely to be a geniune cap badge and if so what type of serviceman would have worn it.? I'm assuming it is WWII.

Many thanks for any help.
Mary