4, 5, and 7 are the ones that I immediately identified as counterfeits. 1, 6, 9, 12, and 15 are also all suspicious. A couple of those may in fact be genuine, but have been treated poorly throughout their life. When I first saw this thread, I honestly sorta thought CoinZip was playing a trick on us, and he would reveal that they were all counterfeits. That would have been a fun twist ending.
1,4,5,7,9,15 are all fakes judging by the obverse letters. I believe 6 is genuine, just worn and cleaned.
@coinzip , are these coins all yours? There seems to be an unusually high concentration of suspect coins in this list. Can you provide us more details? I'd hate to think you've been suckered, but quite a few people are identifying the same coins as being questionable.