Help me identify this Musketeer pendant?

It was found with jewellery from my Nana's house, and we think it belonged to her mother (my great-grandmother). I really want to know more about it, so if anyone knows of anything similar that would be great! If it's any help, it was found with a bunch of 1920s costume jewellery so it might be from that sort of era? I've looked online and can't find anything even similar.

The background is a sort of greyish-black and scratches quite easily, the Musketeer seems to made from different shades of brass.