Greetings! I just completed a little study to find the most difficult Military Mauser Lugers, besides the K-Date. This is based on my data file obtained through many years and sources. Since there are some cross-over serial numbers, I had to determine some of the end points statistically. That's why the numbers seem exact, when actually they are estimates. That doesn't detract from the conclusion.
Enjoy!!
* No P.08 on Frame
** Rust Blue with Mauser Hump