There are virtually endless numbers of these, many of which are not official. It is impossible to tell for sure exactly which ones are authentic. But as a general rule, the more simple the button, the better the chances it is real. I am pretty sure the 'Girl' logos are real, although they were used for several unofficial items. These were used a lot for old 1970s Genesis logos, but I don't know where it comes from. I also think the album buttons are real. The simple GENESIS logo pins are anybody's guess. I've also seen some made with dramatic live shots. These are almost always unofficial.