I just purchased a Bach C with a Ml bore. I haven't seen too many of these out there it is a 229, 25H serial number 32xxx. I know the lead pipe has been changed because I don't think they had the 25H pipe on the very early Elkharts. It's totally been restored and plays like a dream. I have owned many Bach's including C's but never played a Ml C. Why don't more Orchestra's play the ML's.