you still do not understand: I am in a large international community of people who enjoy Russian silver. They invest much time and money in their hobby and have very productive sources (museums, collectors, auction houses etc.) We communicate and brainstorm about our newest aquisitions. And you can bet the existing knowledge and expertise is very big.
If someone uses a book from G. Watt he is no idiot but perhaps did not have the opportunity to buy better out of print books. If someone uses Ivanov we do not look down on him or give him names - we just be cautious and check what he tells.
Did you ever thought about used up punches? Were the new ones 100% identic? Or little/medium/much different? With the help of let´s say 10 different examples from the same maker in different time periods it is easy. If you have nothing in your hands, only books - what can you say?
Thank you for your "list" - all the marks are out of different books, one is from me. Without photos- worthless. Only a hint to watch out.
We say: No photo - it did not happened.
Wladimir Morozov was the son of I. Morozov. Postnikova-L. #1250
Here a seldom seen puch from him - a butter knife in silver.
Maker: Bogdanov, Michail Postnikova-L. #1331