sspierce8, What you already know about your American model is a drop in the bucket about what you will know if you read the book. If a $50 purchase is a strain on your budget, I suggest you go to your public library , check out the book and read it for free. Factory letters on Americans are just the tip of the iceberg, as the records are hard to read and give little info., so Roy has to often improvise to complete a letter on an American. When I started collecting many years ago, a wise dealer/collector, Jim Serven, told me " Ed, when you get a gun, buy a book. Read the book. You will sell or trade the gun but what you learned from the book will stay with you throughout your collecting experience and pay off in spades." Boy, was he ever right ! Ed.