I can't find any information about this coin / token :
it says EDWARDUS VII D.G. BRITT. CORONATION COIN 1902
the back side has the remains of a small ring that was welded onto it, probably to wear it as a pin or so
diameter : 27,4mm, thickness 1,8mm, weight 8g (approx)
Thanks !
Edited by Xavier for over capitalisation and over-sized pictures