Brittish badge of some sort?

[danger67]

Not sure what it is buts it's thin brass

 

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[Frankyg]

Here is a very similar one.

Vintage Coat of Arms Crest Heraldic Brooch - Enameled Shield - fleur ?

 

[danger67]

That sure does have very similar markings

 

[richtam123]

Probably Canadian military.