TT67 - Tiny Button

My husband found this tiny button whilst out on one of his metal detectorist days.....we have no idea how old it is but it looks home made rather than one done on a machine.

It's a little rusty so we also have no idea what it's made from either....

Thanks so much to everyone for all of the lovely hearts and comments for my Mono Monday Blip of my husband's grandfather as a prisoner of war...it was nice to see it on the popular pages!