No problem, Pete. We've all probably made posts without reading every one before, at least I know I have. For others of you reading this, I will strongly back up what TCG said. As for backmarks, a great book is "American Military Button Makers and Dealers; Their Backmarks & Dates" by William F. McGuinn and Bruce S. Bazelon. The backmark is probably one of the most important ways to date a button. For those who really search for buttons I think it is a "must have" addition to your library. An example of this is a "Charleston Police" button that I dug some years ago. I, as did others, thought at the time that it was a Civil War period button and I was excited because it was in great shape. On proper identification of the backmark, however, I discovered that the button was post Civil War. I did find one later that was period but was in terrible condition. Pete, if I've made an error here, by all means correct it. I will be grateful, not offended, and all of us will have learned something that might make a huge difference at some point in our collecting.
BTW, it appears we are about the same age. Ah, the early 60's. What a great time to be coming of age. Have a good one.
Jerry