That was a well reasoned and explained break down on the facts. Thanks for doing it. Just as you need to watch when guns were produced in GB and Spain you need to think about France and the economic struggles in post war era. Your time line and notes about how grades are often blurred or even completely misunderstood should give any would be buyer reason to dig into what the gun is and what is its true value.
Quality is sometimes hard to recognize and it is very easy to convince yourself that your purchase is a better value than it is. I think it is human nature to think that I just made a good buy even when there are few facts to support it. And having the seller tell you that you just got a steal is not a fact.