Hi all, new to the site. I have been a long rifle shooter and a casual builder when I have time. I have built two Lancaster style rifles, 0ne in 1978 and one in 1986. I bought the stock, barrel, trigger and lock from Jerry Marsh in Brookfield, Il. Jerry was quite an accomplished builder and said the components were in his inventory for quite awhile before I purchased them in 1985. The lock is a Doc Hadaway flinter and has his mark and P118. I was wondering if anyone has an idea when this lock was produced. I was told once that it was one of Doc's prototype locks. Any additional data would be appreciated. Thanks!