[Herb]

Hermit, just about all the info on the holster is already there, the maker, the location and the WaffenAmpt contract number. The WaA142 code was also used by O. Reichel of Lengenfeld in 1937. The 142 code was used by various makers from 1936 to 1942. Your question of books is opening a can of worms, I have 13 by various authors and will refer to most of them at one time or another. I have found I use Costanzo's World of Lugers Proof Marks the most as it contains literally hundreds of explanations of proof marks, their locations, year found, etc. Other references are better at explaining manufacturing, history etc, but lack detailed info on proofs. If you intend becoming a serious collector I recommend that you buy everything that you can find. Many of them are long out of print and will cost a premium to get, if you can find them. I have found that the more recent ones are a sometimes a rehash of the older publications with some updated info added as it bacame available. Hopefully this new info is given based upon a very detailed background of knowledge as a goodly number of downright fakes have hit the streets in the last 10-15 years, and perhaps even earlier, that might be included as an original observation by the author. When this happens a lot of discussion ensues here on the Forum as to who is right as to the correct definition of authenticity and often gets out of hand. A good library will probably cost in the neighborhood of $1,000 or so as the out of print books bring a large premium price.