I looked at the underside of my Andrews barrels very closely in good light today and have a few questions. In addition to the proof marks in the picture I posted, there are two other proof marks on the actual barrels themselves. On each barrel is what appears to be a crown over GP. Then, the letters C.W.A. stamped above it on each barrel (C. W. Andrews I assume). Then, there is a small circle on one barrel with the small size letters J A inside. Anyone have an idea what these all mean...especially the small JA?