I am also chatting with some of my regular reader about this matters, some agree that this 50 sen fake is in alarming state. While most people don't know anything about it since they don't collect fake. Maybe my test is not that accurate since I am checking those coins alone but this is what I found out from the test. I am only focusing on 50 sen since it will be expensive to fake other denomination and it will not be worth it and this is the highest Malaysia denomination coin at the moment. You need to compare your coin between the suspected fake and original.
How to spot or detect fake 50 sen.