I have been gone away on a work trip and haven't had the time to study your post. I have been waiting years to see your research and there is a lot info to digest. I did get a bronze case many years ago that some guy picked up at a Hamilton board of trustee meeting. The Hamilton watch company would buy most of the competition watches and take them apart and study and learn about the watch. The one that I picked up was bronze case but it had a very early dial and triangle minute hand but a later rotor and a unsigned case back. So it was a bit of a bastard. Congrats and I am sure you will get more bronze info as time goes on after writing this post. Brian