What is the difference between the English and Germanic locks? My Early Virginia has a Chambers English lock, and it is round-faced; is that the major or only difference between the two? Another rifle I have has a small Siler--I guess that is a Germanic lock? And were the English locks used primarily by builders from the southern colonies, and Germanic locks by Pennsylvania builders? And what type of lock is that one with the rounded tail on my Pedersoli Kentucky?