Aiyoh… why-lah people spent so much effort and money and time on (Research & Development) to come up with fake 50 cents coins? Don't really understand the reason.
Anyway.. watch out for it yah. Mebbe you should carry a Magnet with you at all times. 
PHONY ATTRACTION: A magnet test can determine whether a 50 sen coin is genuine because the magnet will attract the fake coin.
